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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


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.

Matthew O

5 star rating: Highly Recommended November 2016

Probably the best value for money tour in Iceland ;) Seriously though, you get to see lava caves from a thoysand years ago and the majestic waters of silfra all in one tour...and a few extras along the way if you have a good guide like i had with Saga Lif!


5 star rating: Highly Recommended November 2016

Great tour! Only wished the time in the water would have been longer, such amazing sights!!


5 star rating: Highly Recommended September 2016

Had an amazing time on this tour! Our tour guide Oliver was very accommodating, friendly and professional. The cave was super interesting, the walls looked like melted wax and the floor was covered in large rocks and boulders making for an interesting 1.3 km hike. if you have mobility challenges - this is not the tour for you as you had to ensure you watched where you walked as you climbed and there were a few areas where it could be challenging to descend over the rocks. I was traveling with my best friend and we loved it. It was a great adventure!

Snorkeling in Silfra was also amazing! Oliver turned us over to his work colleague Julian and team who assisted us in getting on all the gear. First you put on a one piece snow suit with booties, then comes the wet suit, full head mask and mittens. There is a small walk from the area you suit up to the water and given I felt like the Pillsbury dough boy it was quite hard to move, however it was all well worth it! The water was cold only on your face and hands, however you quickly go numb. The view is amazing and the experience was incredible. I highly recommend this tour and give it a 5 out of 5!

Patrick H

5 star rating: Highly Recommended August 2016

Great tour. My 13 year old daughter and I both had a blast. Definitely a once in a lifetime experience.

Nathaniel F

5 star rating: Highly Recommended July 2016

We were BLOWN AWAY!! The cave hike was amazing! It is a little cold and wet...I definitely recommend water proof pants and jacket, and gloves, but you do get sweaty because there are sections where you have to crawl. The cave never gets to a point where you can't get through though-the guide is really great and explains each section of the cave before you enter.

After the cave, you drive to another location and Snorkel where two tectonic plates are coming apart. It's an incredible experience. When you're putting on the gear you might think it's not worth it, but it totally is. The only part of your body that gets cold in the water is your chin! After about 5 min though, you're used to it and you can enjoy the amazing clear water. I thought I might need a swimsuit, but you don't! Just some leggings and a tshirt to wear under the gear.

Last, bring a lunch!! They only stop at a gas station-no food stops.

Anthony R

5 star rating: Highly Recommended June 2016

Wonderful trip. Great guide Richard

Joy B

5 star rating: Highly Recommended June 2016

I highly recommend this company for this tour. We used other tour companies for the rest of our travel in Iceland and wish we had used these guys for everything. They were friendlier and more knowledgeable than other tour companies we used. Also, the group was small by design so we didn't have the headaches that go along with larger tour groups.

Diane United States of ... 

5 star rating: Highly Recommended June 2016

Amazing day trip! Our tour guide, Oliver, was great! I enjoyed the cave more than I would have expected. Snorkeling was fun too but for all the preparation it takes, it didn't seem like we were in the water all that long. And it was my first time doing that kind of snorkeling so I was a little uncomfortable with all the gear/equipment and worrying about leaks and such. But it worked out quite well. It makes me want to pursue scuba diving! The water was so beautiful. I love being able to say I've been between the North American and Eurasian plates!

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