Lava Tunnel and Snorkeling Adventure - From Reykjavik

6 hours – 5 hours

Reykjavik, Iceland

About this activity

Experience Iceland's geological wonders with a combined lava tunnel exploration and snorkeling adventure in the Silfra Fissure, offering unparalleled underwater clarity and unique rock formations.

Highlights

Snorkel between two continents in Silfra fissure
Explore Raufarhólshellir lava tunnel cave
Experience Iceland above and below ground in one day
Crystal-clear water with exceptional visibility
Enjoy free underwater photos

Full description

Experience Iceland above and below ground on this full-day combo tour from Reykjavik.

Start with a guided lava caving tour at Raufarhólshellir, one of Iceland’s longest lava tunnels. Walk through wide underground passages shaped by volcanic eruptions and see striking rock formations and colors.

Then head to Thingvellir National Park to snorkel in Silfra fissure, where the North American and Eurasian tectonic plates meet. Float through crystal-clear glacial water with exceptional visibility while wearing a dry suit that keeps you warm.

With expert guides, small groups, and free underwater photos, this tour combines two of Iceland’s most unique natural experiences in one seamless day.

Included / Excluded

Pickup and transfer from Reykjavik
Certified PADI snorkeling guide
Professional caving guide
All snorkeling and caving equipment
Dry suit, thermal layers, mask, fins, gloves, hood
Safety equipment for caving
Hot chocolate & cookies after snorkeling
Free underwater photos

Food and drinks (lunch not included)
Personal clothing (base layers, socks, etc.)

Meeting point

Start Location

Thingvellir National Park, Selfoss, Iceland

Important information

Know before you book

Participants must be comfortable swimming and able to float in water.
Minimum age is 12 years; weight limit is 45-120 kg; height limit is 150-200 cm.
Transportation to and from the meeting points is not included; plan accordingly.

Know before you go

Wear warm, waterproof outdoor clothing and gloves.
Bring a fleece or wool sweater and pants for layering.
Ensure you have a change of clothing for after the tour.

Cancellation policy

Free cancellation up to 24 hours before the activity starts

Up to 24 hours before the beginning of the activity: full refund Less than 24 hours before the beginning of the activity or no-show: no refund

Reviews

4.6(1,757 reviews)

Lara Neto

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5.0

Experience of a lifetime We had an absolutely incredible experience on this 6-day tour of Iceland! From breathtaking landscapes to flawless organization, everything exceeded our expectations. Each day was filled with adventure, with stops at stunning locations - glaciers, waterfalls, black sand beaches and the mesmerizing Northern Lights! Our guide (Throstur) was extremely professional, attentive and knowledgeable about every detail of the country. The itinerary was well-planned, striking the perfect balance between adventure and comfort. I highly recommend this experience to anyone looking to explore Iceland authentically and stress-free. A truly unforgettable trip, thank you Artic Adventures!

Marian Kooy

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5.0

Fantastische gletsjerwalk met onze guide Anja van Arctic. Ze vertelde ons veel over de gletsjer en er was genoeg tijd voor het maken van foto’s. Was hier ook heel behulpzaam bij. Ze heeft oog voor de hele groep en of iedereen oké is. Top!

Dorian Nadal

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5.0

Une expérience magnifique avec Kévin et Rob pour une randonnée + escalade sur glacier durant 6h30. C'était une journée magique, et ils ont été absolument adorables, sympathiques et à l'écoute, tout en étant très compétents. 5 étoiles c'est trop peu pour ce qu'on a vécu :) Merci infiniment. Dodo et Lulu