From USD $ 256.94 View price calendar

Low Price Guarantee

Visit Þingvellir National Park for a day of spelunking and snorkeling during this eco-adventure from Reykjavik. On this full-day tour with an expert adventure guide, visit the Silfra fissure and the Gjábakkahellir cave in this UNESCO World Heritage-listed park. Explore some of Iceland's most spectacular natural wonders by snorkeling in an underground pool and climbing into a mysterious cave. All equipment, expert guidance and round-trip transportation Reykjavik hotels are included.


  • Day trip to the Gjábakkahellir cave and the Silfra fissure from Reykjavik
  • Visit Þingvellir National Park, a UNESCO World Heritage Site
  • Explore the dark, mysterious Gjábakkahellir cave with your expert guide
  • Snorkel in the Silfra fissure and admire the amazing, vibrant depths of underground tectonic plates
  • Hotel pickup and drop-off included

Recent Photos of This Tour

What You Can Expect

Day Trip from Reykjavik: Cave Exploring in Gjábakkahellir and Snorkeling in Silfra

Day Trip from Reykjavik: Caving in Gjabakkahellir and Snorkeling in Silfra

Following pickup at your Reykjavik hotel, climb aboard a comfortable, climate-controlled minbus for the 60-minute journey to the UNESCO World Heritage-listed Þingvellir National Park. 

Upon arrival, listen to a short safety lecture and introduction to the area. Get fitted for spelunking and snorkel gear, then follow your expert guide to your first adventure. 

Explore the lava fields under the park itself by entering Gjábakkahellir cave. View and climb through a textbook example of a lava tube, located in one of the most active volcanic areas in the world. During the 1.5-hour tour of the cave, admire shield volcanoes, products of lava flows that left spectacular layers of rock and lava deposits over the years. Please note: In the winter, you will explore Leiðarendi cave.
Break for lunch (own expense) before continuing on to visit Silfra.
At the Silfra fissure, slip on your snorkeling gear and explore the otherworldly underground pool. Drift between the tectonic plates that separate North America and Eurasia, following your guide to the most scenic places in the pool. 
After a day of exploring the spectacular underground wonders in Þingvellir National Park, head back to Reykjavik for drop-off at your hotel.

Customer Reviews

Natalia D

5 star rating: Highly Recommended February 2017

WOW!!! This was out of this world amazing

Brittany B

5 star rating: Highly Recommended February 2017

From the moment we got on the bus we had an Incredible time. A lovely group! Our tour guide, Una, was very friendly, knowledgable and AMAZING! The group I was traveling with had a rental car, but it was so nice to sit back and let someone else do the driving while sharing her knowledge of her country. The lava tube and snorkeling the fissure were once in a lifetime opportunities. I even went back the next day to the fissure to explore the area more. Big thanks to Arctic Adventures for the awesome time!

Ian T

5 star rating: Highly Recommended January 2017

Great guide! Fun time....Being in a lava tube was a great experience, wear waterproof clothing and old boots as the lava rocks chew up shoes. Snorkeling was a very cool experience make sure to have a base layer on, and the only thing that got cold on me was hands. Other than that i was actually quite warm. Take a camera if you have a water proof one. The colors are much better through film then the eyes.

Andreja M

5 star rating: Highly Recommended January 2017

Cave exploring was a great experience, but the snorkeling in Silfra... beyond words.


5 star rating: Highly Recommended December 2016

One of a kind experience. It was truly lovely! Worth the time and money!


5 star rating: Highly Recommended December 2016

You cannot leave Iceland without snorkeling, or diving, the Sifra Fissure. It's the only place to see the amazing rock formations and crystal clear water so deep you cannot see the bottom at some points. Ok, so it's a little challenging to get suited up in the elements, but the staff are awesome. It is an adventure not everyone can claim. Go for it!
The cave was good, but more challenging for this mature traveler to get around in limited light on steady rocks.
It was a great trip that Saga our guide made funny, relaxing, and completely worth our efforts.

f.bordon Canada

5 star rating: Highly Recommended December 2016

This was such an amazing experience! Our guide for the caving was so informative and gave us such a great experience!
The snorkelling was phanominal! It was cold as we did this at the end of November. I believe they said the water was reading at about 2C but well worth the experience and your given the proper equipment to do this anyways! The crew for the snorkelling were well trained and provided a great adventure for those of us who were first timers!
Do not leave Iceland without experiencing these adventures!!


5 star rating: Highly Recommended December 2016

A wonderful day and exciting experience. My guide was fun, energetic, knowledgeable and thoroughly enjoyed telling us about Iceland and the amazing things we were seeing. The day was well planned and not rushed. Make sure to buy food at the stop in the morning as everywhere else is very expensive. The lava tube was really cool, and fun. A few tight spots but nothing too ridiculous Snorkeling in Silfra was exhilarating. The dry suits keep you completely dry and warm with only your head and hands getting wet. It is cold but the experience is so amazing you soon forget. Highly recommend this tour.


5 star rating: Highly Recommended December 2016

The cave was really good, and the guide talked so many interesting stories. The snorkeling.... definitely an experience... But is more about saying you did it, and the experience d the cold water.... because while you're doing it, what you see is not that amazing... its just water and rocks. Your head, hair and hands will get wet. Although you'll only feel really cold in your hands and part of your face. After you get out of the water, you need to walk all wed and cold for about 5 mts to the bus. Terrible cold!

amy m

5 star rating: Highly Recommended November 2016

Best day out ever!!
For caving make sure your clothing is quite protective as there is crawling involved. Dont take a bag in the cave!
The guide was one of the nicest young guys i have met!
Such a cool experience!
Snorkling was mind blowing!! Didnt feel cold in the suit.

Viator uses cookies to improve your experience on our website. Learn more about how we use cookies and how to change your cookie settings | Close message