
Activities with kids
Water parks, theme parks, zoos, museums and boat trips in 5 countries.
Home › Activities with kids in Scandinavia
“What are we doing today?” That question is guaranteed to come when it’s raining at the campsite in Norway or when everyone wants to do something after a long day in the car. With our two boys (around 7 and 9) in mind, we’ve put together water parks, theme parks, zoos, museums, boat trips and caves per country. Only places with their own website are listed here (as of 24 October 2026). Prices and opening hours change, so take a quick look at the website before you set off.
Researched by Arjan from Zuidlaren, so you don’t have to · Sources: the official website for each activity · updated 24 October 2026 · About this page
Go to country: Norway (19) · Sweden (17) · Denmark (17) · Finland (16) · Iceland (13)
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82 activities
Norway
Water parks & spas

Bø Sommarland
According to its website, Bø Sommarland is Norway’s largest water park. There are attractions such as Mot i Brøstet, Halfpipen and Magasuget. Height, weight or age is checked at the attractions, so look beforehand at what your kids are allowed on.
🎟️ Book tickets → official website
Photo: Ssu · CC BY-SA 3.0 · Photo credits
Karting, trampolines & indoor fun

Leos Lekeland
Indoor play paradise. Leos calls itself the largest play centre chain in the Nordics, with thousands of square metres to play in per location. According to the website, you can also hold children’s birthday parties there.
🎟️ Book tickets → official website
Illustrative photo · Photo: Janee · CC BY-SA 3.0 · Photo credits
🎳 Bowling
Lucky Bowl
Bowling chain with alleys in Oslo (Veitvet), Bergen (Kokstad), Stavanger, Trondheim, Kristiansand, Drammen and Ålesund, among others. Nice for a rainy afternoon on the road; the website shows which alley fits your route.
🎟️ Tickets & info → official website
Bowling1
Bowling chain with alleys in Bergen (Vestkanten), Trondheim, Drammen, Hamar, Lørenskog (Megafun) and Sortland in Vesterålen, among others.
🎟️ Tickets & info → official website
Climbing & adventure parks

Høyt & Lavt climbing parks
Climbing in the treetops for the whole family, that’s how Høyt & Lavt describes it. According to the website, there are parks all over Norway, from Oslo and Bergen to Kristiansand and Trondheim. There’s also a season pass that’s valid in all parks.
🎟️ Book tickets → official website
Illustrative photo · Photo: DS Pugh · CC BY-SA 2.0 · Photo credits
Zoos & wildlife parks

Dyreparken Kristiansand
According to its website, Dyreparken combines animals, entertainment and a huge water park in one place. You can also stay overnight there, handy if you want to stay longer than a day.
🎟️ Book tickets → official website
Photo: Bjoertvedt · CC BY-SA 3.0 · Photo credits

Polar Park
Polar Park in Bardu calls itself the northernmost wildlife park in the world. According to the website, you can see bears, wolverines, wolves and lynx there, among others.
🎟️ Book tickets → official website
Photo: Wolfgang Hägele · CC BY-SA 4.0 · Photo credits
Summer toboggan & cable cars

Fløibanen
According to its website, the Fløibanen funicular has been running up Mount Fløyen in Bergen since 1918. There’s room for 120 people per trip.
🎟️ Book tickets → official website
Photo: Diego Delso · CC BY-SA 4.0 · Photo credits

Loen Skylift
According to its website, Loen Skylift is one of the steepest cable cars in the world. It climbs about 1000 metres to the Hoven restaurant on Mount Hoven (1011 m). At the top there’s also a via ferrata.
🎟️ Book tickets → official website
Photo: Blak-ah · CC BY-SA 4.0 · Photo credits
Theme parks

TusenFryd
According to its website, TusenFryd is Norway’s largest theme park. It’s at Vinterbro, not far from Oslo.
🎟️ Book tickets → official website
Photo: Eirik Yven from Oslo, Norge · CC BY-SA 2.0 · Photo credits

Hunderfossen Eventyrpark
According to its website, Hunderfossen Eventyrpark near Lillehammer includes the Eventyrparken and Barnas Gård. From 5 February 2027 the Vinterpark is open, with snow rafting, mini snowmobiles and sledging.
🎟️ Book tickets → official website
Photo: MikkelMagnus · CC BY-SA 4.0 · Photo credits
When it rains: museums & hands-on centres

Fram Museum
At the Fram Museum you can go aboard the original polar ship Fram. According to the website, there are activities for the whole family, and in 2017 it was named Norway’s best museum.
🎟️ Tickets/tour via Viator → Advertisement · affiliate link
Photo: Pudelek · CC BY-SA 4.0 · Photo credits

Norsk Teknisk Museum
According to its website, Norsk Teknisk Museum is the national museum of technology, industry, science and medicine. It’s made for children and adults.
🎟️ Book tickets → official website
Photo: Trond Strandsberg · CC BY-SA 3.0 · Photo credits

Akvariet i Bergen
According to its website, Akvariet i Bergen is Norway’s largest aquarium, with more than 50 tanks. You can see penguins, sea lions, otters and even crocodiles there.
🎟️ Book tickets → official website
Photo: Premeditated · CC BY-SA 4.0 · Photo credits

Holmenkollen Ski Museum and ski jump
The ski museum is inside the Holmenkollen ski jump, with a view over Oslo. According to the website, the museum turned one hundred in 2023 and was completely renewed.
🎟️ Book tickets → official website
Photo: Ralf Roletschek · CC BY-SA 1.0 fi · Photo credits
Nature parks & family walks

Preikestolen (family hike)
Preikestolen is a 604-metre-high rock plateau. According to preikestolen365.com, the hike there and back is 8 km long, takes 4 to 5 hours and is moderately difficult. Prefer a guide? You can book one with the buttons below.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Svein-Magne Tunli · CC BY-SA 3.0 · Photo credits
Boat trips & islands

Nærøyfjord cruise
The Nærøyfjord is on the UNESCO World Heritage List. According to the provider, the classic fjord cruise from Flåm runs one way to Gudvangen, so plan your return trip in advance.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Cbliu · CC BY-SA 4.0 · Photo credits

Boat trip on the Geirangerfjord
According to geirangerfjord.no, you can take a round trip on the fjord from Geiranger lasting 75 minutes or 2 hours. There’s also a quiet fjord cruise.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: jeaneeem · CC BY 2.0 · Photo credits
Caves

Grønligrotta
According to its website, Grønligrotta is the best-known and most visited marble cave in the north, and the only one with lighting. The guided tour goes 400 metres into the mountain, along an underground river, and takes about 45 to 60 minutes.
🎟️ Tickets & prices → official website
Photo: Ranværing · CC BY-SA 4.0 · Photo credits
Sweden
Water parks & spas

Skara Sommarland
According to its website, Skara Sommarland has 13 water attractions and 20 other rides. There’s also karting and water skiing.
🎟️ Book tickets → official website
Photo: Pieter Kuiper · Public domain · Photo credits
Karting, trampolines & indoor fun

Leo's Lekland
Indoor play paradise from the same chain as Leos Lekeland in Norway. Leos calls itself the largest play centre chain in the Nordics, and you can also hold children’s birthday parties there.
🎟️ Book tickets → official website
Photo: Janee · CC BY-SA 3.0 · Photo credits
🎳 Bowling
New Bowl Center
In Enskedehallen (Simlångsvägen 50, Årsta). Family bowling is geared to small children: lighter balls for small hands, fold-up bumpers along the lane and a ball ramp.
🎟️ Tickets & info → official website
Birka Bowling
17 lanes at Birkagatan 16, near S:t Eriksplan. Families with at least one child under 18 pay 405 kr per hour (not on Fridays after 17:00 and not at weekends); shoes are included. Recommended from age 5. On Fridays and Saturdays from 19:00, only from age 18.
🎟️ Tickets & info → official website
Zoos & wildlife parks

Kolmården
According to its website, Kolmården combines animal encounters with Bamses Värld and the Wildfire roller coaster. In autumn there are special seasons such as Halloween and Sagojul.
🎟️ Book tickets → official website
Photo: Zoostar · CC BY-SA 3.0 · Photo credits

Nordens Ark
Nordens Ark is a wildlife park that, according to its website, works to protect endangered species. It’s near Hunnebostrand on the Swedish west coast.
🎟️ Book tickets → official website
Photo: Chell Hill · CC BY-SA 3.0 · Photo credits

Skansen
According to its website, Skansen combines animals with culture and traditions. It’s on Djurgården, just like Junibacken and the Vasa Museum.
🎟️ Book tickets → official website
Photo: Pudelek · CC BY-SA 4.0 · Photo credits
Theme parks

Liseberg
Liseberg is Gothenburg’s theme park. Prices and opening days vary by season, so take a quick look at the website beforehand.
🎟️ Book tickets → official website
Photo: Kigsz · CC BY-SA 4.0 · Photo credits

Gröna Lund
According to its website, Gröna Lund has 27 rides, right in the middle of Stockholm. The park is on the water on Djurgården.
🎟️ Book tickets → official website
Photo: Arild Vågen · CC BY-SA 4.0 · Photo credits

Astrid Lindgren’s World
According to its website, at Astrid Lindgren’s World in Vimmerby you meet Pippi, Emil and Karlsson. Among other things, you walk through Mattis’ castle and Bullerby.
Website: astridlindgrensvarld.se
🎟️ Book tickets → official website
Photo: Kigsz · CC BY-SA 4.0 · Photo credits
When it rains: museums & hands-on centres

Junibacken
According to its website, at Junibacken on Djurgården you ride the Sagotåget through the stories of Astrid Lindgren. There’s children’s theatre, you meet Pippi and the Moomins, and children under 2 get in free.
🎟️ Book tickets → official website
Photo: ArildV · CC BY-SA 4.0 · Photo credits

Vasa Museum
The warship Vasa sank in 1628 and was salvaged after 333 years. According to the website, the museum is one of the most visited in Scandinavia.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Martin Falbisoner · CC BY-SA 4.0 · Photo credits

Universeum
According to its website, Universeum in central Gothenburg has exhibitions and interactive experiences for all ages. According to the provider, you can go on a rainforest safari and do experiments in the lab, among other things.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Gldnjsyektlhliekr · CC0 · Photo credits

Tekniska museet
According to its website, Tekniska museet has interactive exhibitions and Stockholm’s largest planetarium. On 23 October 2026 it said: open daily from 9:00 to 21:00.
🎟️ Book tickets → official website
Photo: Arild Vågen · CC BY-SA 4.0 · Photo credits
Nature parks & family walks

Tyresta National Park
Tyresta is a national park near Stockholm. According to Sveriges nationalparker, you’ll find old pines, spruce forest, rocky plateaus and small lakes there.
Website: sverigesnationalparker.se
🎟️ Tickets & info → official website
Photo: abdeaitali · CC BY-SA 2.0 · Photo credits
Boat trips & islands

Boat trip through the archipelago
From Stockholm you’re quickly out in the archipelago. According to its website, Strömma offers guided boat trips and excursions into the archipelago.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Guillaume Baviere from Copenhagen, Denmark · CC BY-SA 2.0 · Photo credits
Caves

Lummelundagrottan
According to the website, the guided tour of Lummelundagrottan takes you through 400 million years, past fossils and stalactites. They call it a cave adventure for the brave.
🎟️ Book tickets → official website
Photo: Bene Riobó · CC BY-SA 4.0 · Photo credits
Denmark
Water parks & spas

Lalandia (Aquadome)
According to its website, Lalandia has a tropical water park in Billund, Søndervig and Rødby. In Billund the water park is called Aquadome; LEGOLAND is in the same town.
🎟️ Book tickets → official website
Photo: Samuel Gerard · CC BY-SA 4.0 · Photo credits
🎳 Bowling
Bowl'n'Fun & Maximum
Bowling centres in Esbjerg, Haderslev, Aarhus (Viby J) and Aalborg (Maximum), among others. Besides bowling there’s Happie’s Legeland, a play area for children aged 0 to 12, and a buffet.
🎟️ Tickets & info → official website
Zoos & wildlife parks

Givskud Zoo
According to its website, Givskud Zoo is a zoo, safari park and dino park in one. It’s 20 km from LEGOLAND and Vejle.
🎟️ Book tickets → official website
Photo: Helt · CC BY-SA 3.0 · Photo credits

Knuthenborg Safaripark
According to its website, Knuthenborg Safaripark has lemurs and lions, a dino park and a Museum of Evolution, among other things.
🎟️ Book tickets → official website
Photo: René Blumensaadt · CC BY-SA 2.5 · Photo credits

Copenhagen Zoo
According to its website, at Copenhagen Zoo you can see pandas, tigers and giraffes, among others.
🎟️ Book tickets → official website
Photo: Daderot · CC0 · Photo credits
Theme parks

LEGOLAND Billund
According to its website, LEGOLAND in Billund has rides for the whole family. LEGO House and Lalandia are in the same town.
🎟️ Book tickets → official website
Photo: Geoprofi Lars · CC BY-SA 4.0 · Photo credits

Tivoli
Tivoli is in the heart of Copenhagen. According to the website, there are rides, restaurants and theatre.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Jakub Hałun · CC BY-SA 4.0 · Photo credits

Bakken
According to its website, Bakken near Klampenborg is the oldest amusement park in the world. There are 33 rides, and entry to the park is always free.
🎟️ Book tickets → official website
Photo: Erkan · CC BY-SA 3.0 · Photo credits

Djurs Sommerland
According to its website, Djurs Sommerland is the largest summer park in the Nordics, with 9 themed areas and more than 60 rides.
🎟️ Book tickets → official website
Photo: Martin Lewison · CC BY-SA 2.0 · Photo credits

Fårup Sommerland
Fårup Sommerland is a theme park in the forest, according to its website with more than 60 rides, the Aquapark and the Fønix roller coaster. Everything is included in the entry price.
🎟️ Book tickets → official website
Photo: Peter Fiskerstrand · CC BY-SA 4.0 · Photo credits
When it rains: museums & hands-on centres

Experimentarium
According to its website, Experimentarium in Hellerup has been Denmark’s science centre since 1991.
🎟️ Book tickets → official website
Photo: Johan Wessman / News Oresund · CC BY 2.0 · Photo credits

LEGO House
According to its website, LEGO House in Billund has 25 million LEGO bricks. On 23 October 2026 it said: open from 10:00 to 17:00.
🎟️ Book tickets → official website
Photo: Sintakso · CC0 · Photo credits

Den Blå Planet
According to its website, Den Blå Planet is the largest aquarium in Northern Europe.
🎟️ Book tickets → official website
Photo: jsamwrites · CC BY-SA 4.0 · Photo credits

Moesgaard Museum
According to its website, Moesgaard Museum near Aarhus has its own area for children. From 9 October 2026 to 8 August 2027 the exhibition “Maya – riget under junglen” is on.
🎟️ Book tickets → official website
Photo: Switchcase2 · CC BY-SA 4.0 · Photo credits
Nature parks & family walks

Råbjerg Mile
According to Naturstyrelsen, Råbjerg Mile is Denmark’s largest migrating dune: almost 1 km², 4 million m³ of sand and about 40 metres at its highest point. The dune moves around 15 metres to the north-east every year. You don’t need a ticket.
ℹ️ More info → official website
Photo: Olgierd Rudak · CC BY-SA 4.0 · Photo credits

Møns Klint (GeoCenter)
Møns Klint is a UNESCO area. According to the website, the GeoCenter has an interactive exhibition about 70 million years and a 3D cinema, and you can hunt for fossils. On 23 October 2026 admission cost 155 kr for adults and 100 kr for children aged 3 to 11.
🎟️ Book tickets → official website
Photo: kallerna · CC BY-SA 4.0 · Photo credits
Boat trips & islands

Canal trip through Copenhagen
According to its website, at GoBoat you rent a boat yourself for up to 8 people and are your own captain, at no more than 4 knots. Prefer a guide? Below you’ll find tours by electric boat.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Leif Jørgensen · CC BY-SA 4.0 · Photo credits
Finland
Water parks & spas

Serena water park
According to its website, Serena in Espoo is the largest year-round water park in the Nordics. On 23 October 2026 a day ticket cost € 37.00.
🎟️ Book tickets → official website
Photo: kallerna · CC BY-SA 3.0 · Photo credits

Flamingo
According to its website, Flamingo in Vantaa combines a water park, a spa and an indoor playground. It’s open every day of the year.
🎟️ Book tickets → official website
Photo: JIP · CC BY-SA 4.0 · Photo credits
Karting, trampolines & indoor fun

SuperPark
SuperPark started in Vuokatti in 2012 and is an indoor activity park. According to the website, one ticket gets you dozens of activities.
🎟️ Book tickets → official website
Photo: Estormiz · CC0 · Photo credits
🎳 Bowling
Talin keilahalli
With 36 lanes, the largest bowling alley in Finland, at Huopalahdentie 28. All lanes have bumpers for children. Monday to Friday a lane costs € 27 per hour between 10:00 and 16:00; you can rent shoes for € 3. On Fridays and Saturdays from 20:00, only from age 18.
🎟️ Tickets & info → official website
Kampin Keilahalli
Small bowling alley with 9 lanes in the centre of Helsinki. Glow bowling every day; from Sunday to Tuesday there’s no age limit.
🎟️ Tickets & info → official website
Zoos & wildlife parks

Korkeasaari Zoo
Korkeasaari is Helsinki’s zoo, on an island. According to the website, it’s open every day of the year.
🎟️ Book tickets → official website
Photo: Annika Sorjonen / Korkeasaari Zoo · CC BY-SA 4.0 · Photo credits

Ranua Wildlife Park
According to its website, Ranua Wildlife Park in Lapland has 50 Arctic animal species. It’s south of Rovaniemi.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Matzedeluxe77 · CC BY-SA 4.0 · Photo credits

Husky tour (Lapland Royal Adventures)
According to its website, Lapland Royal Adventures in Rovaniemi offers husky tours, including for families. Winter clothing and equipment are included. On 23 October 2026 the short introductory ride took 1.5 hours and cost from € 59.
Website: laplandroyaladventures.fi
🎟️ Book tickets → official website
Illustrative photo · Photo: Letizia Barbi · CC BY-SA 2.0 · Photo credits
Theme parks

Linnanmäki
According to its website, Linnanmäki in Helsinki has more than 40 rides. The park is closed now; the next season is 2027.
🎟️ Book tickets → official website
Photo: Tatu Kosonen · CC BY-SA 4.0 · Photo credits

Särkänniemi
According to its website, Särkänniemi in Tampere combines a theme park, an aquarium, a planetarium, the Koiramäki animal park and the Näsinneula observation tower.
🎟️ Book tickets → official website
Photo: Cryonic07 · CC BY-SA 4.0 · Photo credits

Muumimaailma (Moomin World)
At Muumimaailma in Naantali you step into the world of the Moomins. The park is closed now; according to the website it reopens in 2027 from 15 June (11:00–17:00, in July 10:00–17:30).
🎟️ Book tickets → official website
Photo: Pawel Drozd Drozdp 14:28, 28 June 2006 · CC BY-SA 3.0 · Photo credits

Santa Claus Village
According to its website, at Santa Claus Village near Rovaniemi you can meet Santa Claus every day of the year. The Arctic Circle runs right through the village.
Website: santaclausvillage.info
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Leonhard Lenz · CC0 · Photo credits
When it rains: museums & hands-on centres

Heureka
Heureka in Vantaa is the Finnish science centre where, according to the website, you try things out yourself. There’s a dinosaur exhibition with more than 20 life-size dinos.
🎟️ Book tickets → official website
Photo: Skyfoto · CC BY 4.0 · Photo credits

Arktikum
According to its website, Arktikum in Rovaniemi is a science centre and museum in one. A good plan for a cold or wet day in Lapland.
🎟️ Book tickets → official website
Photo: Clemensfranz · CC BY 3.0 · Photo credits
Nature parks & family walks

Nuuksio National Park
According to luontoon.fi, Nuuksio has the largest forest areas in the Helsinki region, with old forests, rocks and clear lakes. There’s also the Haltia nature centre.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Stephan van Helden · CC BY-SA 4.0 · Photo credits
Boat trips & islands

Ferry to Suomenlinna
Suomenlinna is a fortress on the World Heritage List, built from the middle of the 18th century according to the website. You reach it by ferry from Helsinki.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Andre Riemann · CC BY-SA 3.0 · Photo credits
Iceland
Water parks & spas

Laugardalslaug
According to the City of Reykjavík, Laugardalslaug is Iceland’s largest swimming pool, with a 50-metre outdoor pool, indoor pool, children’s pool and slides. Open Mon–Fri 6:30–22:00 and Sat–Sun 8:00–22:00; some hot pots and the steam bath are currently closed.
🎟️ Tickets & info → official website
Photo: Christian Bickel fingalo · CC BY-SA 2.0 de · Photo credits

Sky Lagoon
Sky Lagoon is near Reykjavík. According to the website, the seven-step Skjól ritual is part of the experience. Check the minimum age for children on the website beforehand.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Laurenmcl · CC BY-SA 4.0 · Photo credits

Blue Lagoon
According to its website, the Blue Lagoon is a lagoon with geothermal seawater. Check on the website beforehand which rules apply to children.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Acediscovery · CC BY 4.0 · Photo credits
🎳 Bowling
Keiluhöllin Egilshöll
Bowling alley with 22 lanes in Egilshöll (112 Reykjavík), with Shake & Pizza in the building. On Fridays and Saturdays an age limit of 18 applies from 22:00; younger guests can then only come with a parent or guardian.
🎟️ Tickets & info → official website
Zoos & wildlife parks

Whale watching
According to its website, Elding is a family business that has been running whale-watching tours for more than 25 years, all year round. The boats leave from Reykjavík’s Old Harbour.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Jakub Hałun · CC BY-SA 4.0 · Photo credits
When it rains: museums & hands-on centres

Perlan
Perlan is a nature museum in Reykjavík. According to the website, you walk through a glacier experience and get a panoramic view.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Guilhem Vellut from Annecy, France · CC BY 2.0 · Photo credits

FlyOver Iceland
FlyOver Iceland in central Reykjavík is a simulated flight over Iceland. According to the website, it works in any weather.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Shadowgate · CC BY 2.0 · Photo credits

Whales of Iceland
According to its website, Whales of Iceland is the largest whale museum in Europe, with life-size models. There’s an audio guide in 17 languages.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Milan Nykodym from Kutna Hora, Czech Republic · CC BY-SA 2.0 · Photo credits

Lava Show
According to its makers, this is the only live lava show in the world. You see real, glowing lava up close, indoors in Reykjavík.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Mokslo Sriuba · CC BY-SA 4.0 · Photo credits
Nature parks & family walks

Golden Circle (Þingvellir, Geysir, Gullfoss)
The Golden Circle is a day trip to Þingvellir, Geysir and Gullfoss. According to the national park, Þingvellir lies on Þingvallavatn, Iceland’s largest lake.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Diego Delso · CC BY-SA 4.0 · Photo credits
Boat trips & islands

Boat trip on Jökulsárlón
According to icelagoon.is, boats sail between the icebergs on the Jökulsárlón glacier lagoon, by Zodiac or amphibious vehicle. From Reykjavík it’s a long day trip.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: rheins · CC BY 3.0 · Photo credits
Caves

Raufarhólshellir (lava tunnel)
According to its website, Raufarhólshellir is one of the longest lava tunnels in Iceland and lies 30 minutes from Reykjavík. It’s open all year.
🎟️ Tickets/tour via Viator → 🎟️ Also on GetYourGuide → Advertisement · affiliate link
Photo: Jakub Hałun · CC BY-SA 4.0 · Photo credits

Ice cave in Vatnajökull
With a guide you can visit the ice caves in Breiðamerkurjökull, a glacier tongue of Vatnajökull. According to the national park, rangers supervise the ice caves. Never go into an ice cave without a guide.
Website: vatnajokulsthjodgardur.is
🎟️ Tickets/tour via Viator → Advertisement · affiliate link
Illustrative photo · Photo: Eric Kilby · CC BY-SA 2.0 · Photo credits