5 star rating: Highly Recommended 28 Reviews

5 star
4 star
3 star
2 star
1 star
  • Location:Reykjavik, Iceland
  • Duration:8 hours (approx.)

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

This adventurous tour is your chance to go cave exploring and snorkeling in one incredible day. On this day trip from Reykjavik, visit Iceland's Gjábakkahellir cave and the Silfra fissure, both located in the UNESCO World Heritage-listed Þingvellir National Park. Marvel at unique sights and discover the depths of some of Iceland's most stunning natural wonders as you explore a mysterious cave and snorkel in a pristine, dream-like underground pool. Your friendly, knowledgeable guide will make sure that you have an unforgettable experience.


  • 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

After pickup from your Reykjavik hotel, head by comfortable mini-coach in less than an hour to Þingvellir National Park, a UNESCO World Heritage Site, to begin your amazing Iceland adventure.

Listen to a brief safety introduction, and then follow your guide to explore the dark, mysterious world of the lava field under Þingvellir National Park. Enter Gjábakkahellir and discover the marvels that volcanic activity has created; the cave is a perfect example of an Icelandic lava tube and is situated in one of the most active volcano areas in the world due to the riffs that enabled lava to surface ages ago. See shield volcanoes, which are products of lava flows that left impressive layers of scenery over the years. After exploring the cave for an hour and a half, take a break for lunch (own expense) before moving on to the blue depths of Silfra.

Head to the Silfra fissure, one of Iceland’s most-hidden treasures. Admire the otherworldly scene of the rift, famous for its heavenly shades of crystal-clear blue water, and feel weightless as you float lazily for two hours down the current.

Then, put on your snorkel gear and continue exploring the dream-like underground pool. Your guide will lead you to the most scenic spots as you swim between the North American and Eurasian tectonic plates.

When your incredible journey is over, the coach will take you back to your hotel in Reykjavik.

Please note: In the winter Leiðarendi cave will be explored in the first part of this tour.

Customer Reviews

5 star rating: Highly Recommended November 2015

By far the most unique experience yet. Standing in the moss covered lava field and surrounded by dormant volcanoes is a site like no other. It had snowed the day before, so the contrasting white to the greens, yellows, browns and blacks just added to the spectacular vista. We were pleasantly surprised by the level of activity required to explore the lava cave. It is not an extreme activity, but it's not a walk in the park, either. Oskar was our host for the day. He is very professional and kind with a good sense of humor. He is very knowledgeable about the history and geography of the regions he escorted us through. Richard and Norris were our hosts in Silfra. These are two men who really enjoy their work. They were very proficient at sizing us up, outfitting us and getting us into our gear. They are very funny and kind and they made us feel completely at ease before getting into the water. Once in the water, we were encouraged take our time and to savor the experience for as long as we liked. Any pictures you see of snorkeling in Silfa are true to likeness. The colors and clarity of water are truly something to behold. This excursion is worth your consideration. It's a full, action-packed day spending much more time out of the vehicle than in it.

5 star rating: Highly Recommended October 2015

This was an excellent adventure. We enjoyed both the caving and the crystal clear water of silfra.

5 star rating: Highly Recommended August 2015

What a blast! We loved the authentic caving experience! It does require some climbing - but I am not in great shape and did just fine! Our guide was friendly, encouraging and knowledgable. Our small group of 10 was the perfect size. The snorkeling was awesome too! What a view! Do this tour!

5 star rating: Highly Recommended August 2015

Worth every penny! This was one of the highlights of my trip. Before I went I thought that it was kind of expensive, but after the day was over I realized it really wasn't. The water is unbelievablely clear and even though the water is cold I never once felt cold myself. Absolutely AMAZING!!!!

5 star rating: Highly Recommended July 2015

Snorkeling was awesome. A highlight of my around the world trip!

5 star rating: Highly Recommended June 2015

This tour was fun, a little bit challenging, and a great way to see parts of Iceland beyond your usual bus tour.

Juan was a great guide - he picked us up from our hotel promptly and took us straight to the National Park to snorkel with the other guests in the small tour. Getting suited up in the dry suits was a bit of a long process, but Richard and Juan explained everything and made sure everyone was comfortable before going in the water. They both had some great tips for how to deal with the cold and where to look to see the best views underwater. I've never seen water that clear or felt it that cold!!, and saying you snorkeled in the continental divide is pretty awesome.

After a brief lunch stop, we were off to the lava tubes on the other side of Reykjavik - Juan told us all about how they were formed, helped us through the tight spots in the tunnels, and made it a fun experience with a few stories. The lava tubes were fascinating to see up close, and this was one of the more authentic caving experiences I've seen.

5 star rating: Highly Recommended June 2015

The tour was really a great time. The tour guide was very knowledgeable during the lava cave exploring. Also the snorkeling is a must do.

5 star rating: Highly Recommended February 2015

Trip was amazing. Very memorable and unique. Our guide was really personable and made the tour very interesting.

5 star rating: Highly Recommended January 2015

It was amazing!! it is a life time experience. Before the tour I was scared that I was going to freeze my soul and get sick (I did it during the winter), but the dry suit really keeps you warm. The guides are amazing, they are really professionals and know what they are doing. I really had a fantastic time, I'm so glad I decided to do it, and I would recommend it to everybody.

5 star rating: Highly Recommended October 2014

This tour, with Arctic Adventures, was a truly amazing adventure. With very knowledgeable and friendly guides we walked through a lava tube and then went snorkeling in Silfra in a fissure with one of the clearest waters in the world. Getting into a dry suit is not easy but definitely worth the effort!

From USD $ 192.69

View price calendar

Low Price Guarantee

Select Travel Date

Flexible Date Guarantee

Enter Total Number of Travelers

What's this, and can I change it?

Please note: After your purchase is confirmed we will email you a link to your voucher.
What's this?

Tour code: 5590LAVA


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