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10 giờ
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Embark on an unforgettable adventure combining two of Iceland’s most breathtaking experiences.
Begin your journey with a thrilling exploration of Raufarhólshellir, one of Iceland's longest and most renowned lava tunnels. Located just 45 minutes from Reykjavík, this extraordinary underground passage dazzles with vibrant colors and fascinating rock formations, offering a rare glimpse into the heart of a volcanic marvel.
Next, venture to the Silfra Fissure in the UNESCO World Heritage-listed Þingvellir National Park. Dive into crystal-clear waters for an unparalleled snorkeling adventure, where you’ll float between two continental plates in a surreal, otherworldly environment.
With an expert guide by your side, uncover the secrets of Iceland's geological wonders as you journey through a mesmerizing lava cave and immerse yourself in Silfra's pristine, dreamlike underwater world.
Not recommended for travelers with spinal injuries
Travelers should have at least a moderate level of physical fitness
Minimum age is 12 years old. Participants under 18 must be accompanied by a parent or adult guardian booked on the same tour.
We recommend bringing warm outdoor clothing, packed lunch, thermal underwear, a change of clothing, towel, gloves, hat and good hiking shoes
Snorkeling masks cannot accommodate glasses. If you do not have a prescription mask of your own, please arrange to use contact lenses
Requirements: Weight limit: 45-120kg. Height limit: 150cm – 200cm. Must be able to swim.
Guests must carefully review our Snorkeling in Silfra Handbook before the tour to ensure everyone can safely participate: https://adventures.is/media/240250/arctic-adventures-snorkeling-in-silfra-fissure-guide.pdf
Pregnant women cannot participate in the snorkeling portion due to the risk of cold water entering the suit.
Medical issues outlined in our handbook require doctors approval to join the tour. Some conditions mean guests cannot participate.
Guests must have signed medical clearance from a doctor if you have any conditions outlined in the handbook (asthma, diabetes, high blood pressure, among others - see handbook)
For a full refund, cancel at least 24 hours before the scheduled departure time.
This is a combination of our two classic tours: The Lava Tunnel + Snorkeling the Silfra Fissure - the ultimate geological day tour adventure! Explore the lava tunnel & snorkel between tectonic plates in the crystal-clear waters of Silfra. Join both unforgettable experiences with this value-packed combo. Your day begins at The Lava Tunnel, where your expert guide leads you through a vivid underground world shaped by past volcanic eruptions. Equipped with all necessary safety gear, you’ll witness colourful mineral deposits, dramatic rock formations, and learn how Iceland’s unique geology carved this extraordinary cave. Next, continue to Thingvellir National Park, a UNESCO World Heritage Site and home to the famous Silfra Fissure. Here you’ll snorkel between the North American and Eurasian plates in glacial meltwater that has been naturally filtered through lava fields for decades, creating unmatched clarity with visibility reaching 100–150 meters. You can meet us directly at each location or choose the Reykjavík Transfer option for a seamless, no-car-needed experience. We’ll handle pick-up, transport between sites, and drop-off, so you can simply relax and enjoy the adventure.
Silfra Fissure Snorkelling with Certified Divemaster
Optional Reykjavík Transfer - Pickup & Dropoff
Visit Thingvellir National Park, a UNESCO World Heritage Site
All Necessary Caving & Snorkeling Gear
Hot Chocolate + Cookies After Snorkeling
Complimentary underwater photos taken by your guide
Lunch not included. Guests may bring a packed lunch or purchase food at designated stops
Please bring: Warm base layers, towel, change of clothes, thick socks
Chọn điểm đón
Winter Season Sept 1 - May 14: Have your own car? Meet us at each location! The first meeting point is The Lava Tunnel at 9:30. Snorkeling is at 13:30.
Summer: May 15th - Aug 31st: No car needed! We will pick you up
Pickup included
Summer: May 15th - Aug 31st: Have your own car? Meet us at each location!
Winter: Sept 1st to May 14: No car needed! We will pick you up
Pickup included
168 đánh giá
Tổng số đánh giá và xếp hạng từ Viator & TripAdvisor
Christie S,,6 thg 1, 2026
- Đánh giá từ Viator
Our day started with the Lava tunnels this was a great experience especially after seeing the Lava Show the night before. Our tour guide into the tunnels was very informative. The later portion of our day was snorkeling at the silfra fissure which in January has its challenges like frozen suits which are hard to put on and freezing while you wait to get into the water but the views while snorkeling will worth it! Our bus driver for the day was so informative with Iceland's history we enjoyed hearing everything about the land, culture and people.
Gary P,,15 thg 8, 2025
- Đánh giá từ Viator
The Lava Tube was amazing. Incredible and enjoyable. Our guide was awesome. The snorkeling tour on the other hand was unbelievably disorganized. They packed to many tours to close together. None of the staff took the time to properly fit us, most suits were still wet, damp or being used. I had to insist on a proper fitting as they put me in a suit initially that was way too big. The equipment is in rough shape half of the undergarments were missing zippers and the staff stated it wasn't important. This would prove to be incredibly wrong in about an hour. Nothing was fit correctly. Our staff member was very helpful and nice but the equipment failed on me once we got about 20 minutes into the swim. My suit started leaking and at this point I had to swim the rest of the way in order to finish. I was soaked all the way to my socks. For the amount of money we paid this was unacceptable. My wife's suit faired well thankfully. However this company Arctic Adventures needs to replace a lot of their equipment, this is unsafe and could result in a serious incident or death if it was someone who was smaller and had less body heat. This needs to be reported to the agency that monitors tourism and activity. Please be advised if you book through this app you have no choice in the expedition company. The other surrounding companies looked liked their equipment was much much better. This was unsafe. To her credit my instructor got us out of the water as quickly as she could. However, if this had happened to my wife's suit I may have reacted differently. Buyer Beware.
Varun G,,9 thg 7, 2025
- Đánh giá từ Viator
Both Lava Tunnel tour & Sifra Snorkeling are unforgettable unique experiences..... A tad challenging for old people, but for kids and adults, unmissable
Megan S,,24 thg 6, 2025
- Đánh giá từ Viator
The lava tunnel was neat but different than I expected. Snorkeling was absolutely amazing! I loved that our guide Oliver took some photos during the adventure. I wish I would have booked them separately as waiting almost 2 hours at a bakery with no bathroom was not pleasant.
Shavit L,,16 thg 5, 2025
- Đánh giá từ Viator
The experiences themselves were 5 stars, 6 if possible. However, the organizing company - Arctic Adventures was extremely unprofessional, rude at times and put a damper on an otherwise great day. We didn't use their shuttle service as we have our van we are roadtripping with so when arriving at the cave (as requested 15 mins before start time) we were very much surprised to hear our "group" had actually arrived much earlier and had started the cave tour without us, we had to wait an hour to join the next tour. The cave was beautiful, guide was knowledgeable, entertaining and our time underground was a fantastic experience. After this we had to rush to the snorkeling site to be there at the appointed time only to discover that our reservation was changed without our knowledge to a later time. The snorkeling guide was not helpful and honestly quite rude about the situation. After some coaxing we managed to join our original snorkeling time with a rather dismissive unpleasant guide. The snorkeling itself was fantastic and we can not recommend it enough, definitely make sure you get a tour with pix cause it's worth it. BUT DO NOT BOOK WITH ARCTIC ADVENTURES!

Courtney M,,7 thg 5, 2025
- Đánh giá từ Viator
If I could rate this a 100/5 stars I would. This is a once in a lifetime experience. The lava tunnel team created an atmosphere that was educational while also adventurous. The snorkeling was so unique! My husband and I were nervous about the cold at first but if you listen to the instructors it’s really only your hands and face getting wet. The team breaks you into such small groups you feel like you’re getting a very personal experience with a professional team. I am so glad we booked this tour! It’s something we will always share as a must do activity with future travelers.
David T,,1 thg 3, 2025
- Đánh giá từ Viator
We had a great time. The trip into the lava tunnels was very a great way to start the day and snorkeling between the tectonic plates was a once in a lifetime experience!
Daydream10364781743,,6 thg 10, 2024
- Đánh giá từ Tripadvisor
Our guide Theresa was great. She explained everything well, was always courteous and helpful. All the time she kept good humor.
Gloria s,,20 thg 8, 2024
- Đánh giá từ Viator
The tours were each fun . But when booking they don’t tell you that your on 2 different tours and we didn’t have any idea about how we meet the second half of the tour . Not very clear on the itinerary
Robert L,,3 thg 1, 2024
- Đánh giá từ Tripadvisor
The Arctic Adventures Black and Blue tour. The Lava Tunnel experience was excellent. Our guide was a very knowledgeable Greek chap named Dimitri who made the trip very entertaining. The tour provides crampons and a light/helmet for the walk into the history of a lava tunnel. Many photo opportunities and a fantastic time had by all. In the afternoon after a lunch break we transferred to the Silfra fissure for snorkelling. Theresa was an exceptional guide who kept us safe and entertained. The preparation is very thorough: personal base layer, warm body suit and a well fitted dry suit. Gloves, hat, mask, snorkel and flippers and we were ready to go after about 45 minutes. The water is so clear. The equipment kept us buoyant and warm. After initial instructions we drifted with the current through the fissure with amazing views below us. The team take photos for downloading later so you don’t need to take a camera if you don’t want to. After 30 minutes or so we were out of the water, heading back to get into warm clothes for hot chocolate and a snack. This is an unforgettable experience that we all enjoyed (13-51y!). Yes your face gets cold. Yes your lips feel a little swollen - but the water is 2-4 degrees C!! Excellent team providing an excellent experience. Thank you!!




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