This tour will take you into the depths of Iceland, where you will see two wildly contrasting, yet equally beautiful natural wonders. From Reykjavik, we will take you to a lava tube cave, crafted centuries ago by a river of molten lava. There you will see Iceland’s dark underworld: most definitely one of its best kept secrets. Then it's a plunge into the icy clear waters of Silfra Fissure, to swim between Europe and America. Snorkeling in Silfra was rated the Top 5 activities in the world by TripAdvisor in 2019!
Duration: ~9 hours
Pick-up: 8 a.m.
Available: All year
Age limit: 12 years*
- Snorkeling in Silfra
- Lava Caving
- Thingvellir National Park
starts at 8 a.m. in Reykjavik. We will drop you off in Reykjavik at around 5 p.m. after the tour.
- Participants need to be comfortable in the water and be able to swim
- You are unable to participate if you are pregnant
- Weight limit: 45-120 kg
- Height limit: 150 cm -200 cm
- *Age limit: Participants under the age of 18 must be accompanied by a parent or adult guardian booked on the same tour.
- Read our Snorkeling in Silfra Handbook for how to prepare for your adventure.
Certified PADI Dive guide / Divemaster, all transfers, expert caving guide, all necessary snorkeling and caving gear and Silfra admission fee
Lunch. We will stop at a place where you can buy food (you can also bring packed lunch).
Bring with you:
Warm and waterproof outdoor clothing, gloves, warm undergarments (fleece/wool), warm socks, a change of clothing (just in case).
Don’t worry, you can always rent sturdy hiking shoes, waterproof jacket and pants in the online booking process. We do not rent gear from location.
Silfra Fissure probably has the clearest water in the world. That‘s mainly because of the cold temperature and lava filtration. It‘s always cold, from 2°C – 4°C. The source is glacial water from Langjokull and on its travel It has to break through lava, so it gets filtrated on its way.
Want to do this trip for free? Tag us @extremeiceland on your social media stories and photos during your trip and enter a chance to win a full refund. The winner will be picked once a month!
Review on TripAdvisor
"I had an amazing day exploring a cave with the guide Biggi. As we were only two on the tour, he answered all our questions and we could take many pictures. We spent about one hour inside, maybe even more time, so we got a sense of feeling for the cave. Afterwards we drove to the Pingvellir - Nationalpark, where we had a lunch - break. Afterwards we went snorkeling in Silfra. The organisation was fantastic, we were equipped very fast so it wasn't too cold. Our guide was very patient and made us feel welcome and comfortable, what is important, when you are snorkeling the first time. The experience was absolutely amazing! I highly recommend that tour."
This tour will allow you to see Iceland from a different perspective: taking you caving and snorkelling in areas of incredible natural beauty. From the crystal clear depths of the Silfra fissure, to the stunning rock formations of a lava tube cave, you are in for a truly incredible experience.
We will begin by collecting you from Reykjavik and taking you on “the dark” part of the tour, where we will explore one of the lava tube caves close to Reykjavik.
Raufarhólshellir is one of the longest lava tubes in Iceland and a fantastic place to explore! discover how volcanic activity has helped to form Iceland over the millennia. A lava tube is a tunnel, through which lava travels beneath the Earth's surface. As the lava cools and the volcano ceases to be active, it forms a long round tube filled with stunning rock formations.
After we finish the caving, you will have a chance to grab some lunch between the two activities.
From there, we will travel to the heart of Thingvellir National Park, where you will see the remarkable Silfra Fissure. Silfra is an underwater gap, which lies between the tectonic plates of Europe and North America, meaning that you will be snorkeling between two continents! Silfra, is also filled with filtered glacial water, which makes it the clearest water, which you can find anywhere in the world. Underwater visibility stands at over 100m, meaning that as you drift through the deep blue water, you will see the stunning natural landscape in all its majestic glory.
Our certified guide, will equip you with a dry-suit, (the glacial water is around 2-4 degrees) and then guide you through Silfra: consistently described as the greatest dive site in the world. The clarity of Silfra’s water also makes it the perfect place to take some of the most incredible pictures that you will ever see: combining light and dark, rock and water, excitement and natural beauty, this tour is a must for anyone visiting Iceland.
Read customer reviews
Snorkeling and Caving - Rated 4.8/5 based on 6 customer reviews
Amazing5 by Michelle May 29, 2018
Awesome Guide and Awesome Adventure5 by Christine March 26, 2018
Amazing experience with a kindly tour guide5 by LEDER March 9, 2018
Outstanding!!!5 by Steve Parker February 23, 2018
Informative and fun4 by Michael February 3, 2018
Perfect day!5 by Britta February 2, 2018
Disclaimer: all snorkeling trips undertaken are the responsibility of its participants. Extreme Iceland does not assume any responsibility for accidents which are caused by its customers or can be traced to their own actions. Participants have to sign a waiver before undertaking all trips stating that they realize that all outdoor activities carry an inherit risk.