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Iceland Lava Tunnel & Silfra Snorkeling Adventure
4.6
167 Ratings
Raufarhólshellir
Explore Raufarhólshellir lava tunnel and snorkel in Silfra fissure at Thingvellir National Park. Discover Iceland’s stunning natural wonders on this unique adventure.
Explore Raufarhólshellir lava tunnel and snorkel in Silfra fissure at Thingvellir National Park. Discover Iceland’s stunning natural wonders on this unique adventure.
Duration:
10 hours
Cancellation:
24 hours
Highlights
- Raufarhólshellir - Discover the enchanting beauty of the Raufarhólshellir lava tunnel and enjoy snorkeling between the Eurasian and North American tectonic plates. The Silfra Fissure is the unique spot globally where swimming between continents is possible! Participants can either meet at each tour location or select the Reykjavík Transfer option,…
- Raufarhólshellir - Discover the enchanting beauty of the Raufarhólshellir lava tunnel and enjoy snorkeling between the Eurasian and North American tectonic plates. The Silfra Fissure is the unique spot globally where swimming between continents is possible! Participants can either meet at each tour location or select the Reykjavík Transfer option, where they will be picked up, transported between sites, and dropped off.
What's Included
- Silfra Fissure Snorkelling with Certified Divemaster
- Free Underwater Photos Taken By Your Guide
- Optional Reykjavík Transfer - Pickup & Dropoff
- Visit Thingvellir National Park, a UNESCO World Heritage Site
- All Necessary Caving & Snorkeling Gear
- Hot Chocolate + Cookies After Snorkeling
- Free wi-fi on board
- Silfra Fissure Snorkelling with Certified Divemaster
- Free Underwater Photos Taken By Your Guide
- Optional Reykjavík Transfer - Pickup & Dropoff
- Visit Thingvellir National Park, a UNESCO World Heritage Site
- All Necessary Caving & Snorkeling Gear
- Hot Chocolate + Cookies After Snorkeling
- Free wi-fi on board
What's Not Included
- 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
- 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
Additional Information
Embark on an unforgettable journey that combines two of Iceland’s most stunning experiences.
Start your adventure with an exhilarating exploration of Raufarhólshellir, one of Iceland’s longest and most famous lava tunnels. Situated just 45 minutes from Reykjavík, this remarkable underground passage captivates with its vibrant colors and intriguing rock…
Embark on an unforgettable journey that combines two of Iceland’s most stunning experiences.
Start your adventure with an exhilarating exploration of Raufarhólshellir, one of Iceland’s longest and most famous lava tunnels. Situated just 45 minutes from Reykjavík, this remarkable underground passage captivates with its vibrant colors and intriguing rock formations, providing a unique insight into the core of a volcanic wonder.
Then, head to the Silfra Fissure in the UNESCO World Heritage-listed Þingvellir National Park. Dive into the crystal-clear waters for an unmatched snorkeling experience, where you’ll float between two continental plates in a surreal, otherworldly setting.
With a knowledgeable guide accompanying you, discover the secrets of Iceland’s geological marvels as you explore a captivating lava cave and immerse yourself in Silfra’s pristine, dreamlike underwater realm.
- Minimum age is 12 years old. Participants under 18 must be accompanied by a parent or adult guardian booked on the same tour.
- It is recommended to bring 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)
Location
Raufarhólshellir
The first meeting point is Raufarholshellir Lava Tunnel for your 9:30 tour.
Next, meet us in Thingvellir National Park for snorkeling at 13:30 (Sept 1-May 14) or 14:00 (May 15-August 31). Please arrive at least 15 minutes early. Park at ''Thingvellir P5''.
Cancellation Policy
For a full refund, cancel at least 24 hours before the scheduled departure time.
For a full refund, cancel at least 24 hours before the scheduled departure time.
Customer Ratings
4.6
(167 Ratings)
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Varun_g
Jul 9, 2025
Both Lava Tunnel tour &... - Both Lava Tunnel tour & Sifra Snorkeling are unforgettable unique experiences..... A tad challenging for old people, but for kids and adults, unmissable
Review provided by Viator
Courtney_m
May 7, 2025
Must Do Activity - 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.
Review provided by Viator
David_t
Mar 1, 2025
We had a great time. The... - 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!
Review provided by Viator
Daydream10364781743
Oct 6, 2024
Pleasure and beauty - Our guide Theresa was great. She explained everything well, was always courteous and helpful. All the time she kept good humor.
Review provided by Tripadvisor
Robert
Jan 3, 2024
Black and Blue Arctic Adventure! - 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!!
Review provided by Tripadvisor
W8000ozerich
Apr 25, 2023
Out of this world - What an amazing experience. Even though the weather was horrible it made for a perfect day to be in the lava cave and snorkel in the Silfra. Both our guides were very knowledgeable and helpful with gear. Both tours were so unique and out of this world. Don't worry about being too cold in the Silfra water. The gear keeps you very warm and the experience is unforgettable.
Review provided by Tripadvisor
Megan_s
Jun 24, 2025
Enjoyed both activities but waiting at bakery for 2 hours wasn’t pleasant. - 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.
Review provided by Viator
Shavit_l
May 16, 2025
Do it! But not with arctic adventures! - 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!
Review provided by Viator
Gloria_s
Aug 20, 2024
Fun but confusing - 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
Review provided by Viator
Gary_p
Aug 15, 2025
Buyer Beware Arctic Adventures - 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.
Review provided by Viator
