Silfra Snorkeling and Leidarendi Lava Tunnel with Underwater Photos
Dive between tectonic plates and descend into a volcanic underworld in a single unforgettable day.
Silfra snorkeling in the crystal-clear waters of Þingvellir National Park, combined with a guided walk through the Leidarendi lava tube, offers two of Iceland's most distinct natural encounters back to back. This full-day tour is rated easy, meaning no prior diving or caving experience is required. All necessary equipment is provided on the day.
Þingvellir National Park is a UNESCO World Heritage Site where the North American and Eurasian tectonic plates meet. The Silfra fissure, filled with glacially filtered freshwater, reaches depths of 60 to 63 meters at its deepest point. Visibility in these waters can extend the full length of the canyon, creating a sensation often described as floating through air.
The Leidarendi lava tube stretches approximately 900 meters through the Blue Mountain area near Reykjavik. Formed by ancient volcanic activity, the tunnel features distinctive rock formations including lava stalactites and natural shelves along its walls. Some sections require light crawling, though access throughout the cave remains manageable for most fitness levels.
Snorkeling is available in either a wetsuit or a drysuit depending on your preference. The wetsuit option allows greater freedom of movement and the ability to surface dive, while the drysuit provides additional thermal insulation. Underwater photos are included so you can bring the experience home with you.
Tour Highlights
Snorkel the Silfra fissure between the North American and Eurasian tectonic plates.
Receive professional underwater photos captured during your snorkeling session.
Explore the 900-meter Leidarendi lava tube with unique volcanic rock formations.
Visit a UNESCO World Heritage Site at Þingvellir National Park.
Swim through some of the clearest freshwater on the planet with near-unlimited visibility.
No diving licence or caving experience required — suitable for beginners.
All snorkeling and caving gear is supplied, including wetsuit or drysuit options.
Itinerary
Meet your guide at the designated meeting point near Þingvellir National Park. Receive a full briefing on the day's activities and get fitted with your snorkeling equipment, choosing between wetsuit and drysuit options.
Enter the Silfra fissure and snorkel through its main sections, including the famous Silfra Hall, Silfra Cathedral, and the Silfra Lagoon. Your guide will accompany you throughout and capture underwater photos during the session.
After exiting the water, change out of your snorkeling gear and warm up with a hot drink. The group then travels to the Blue Mountain area for the caving portion of the tour.
Enter the Leidarendi cave and walk through its 900-meter length, guided by an expert who will point out volcanic stalactites, lava shelves, and other geological features. Light crawling may be required in select passages.
Exit the lava tube and return to the meeting point. Your underwater photos from the Silfra session will be shared with you to mark the end of the tour.
What Is Included
Included
- Professional guide throughout the full tour
- All snorkeling equipment (wetsuit or drysuit, mask, fins, gloves, hood)
- Caving equipment including helmet and headlamp
- Underwater photos from the Silfra snorkeling session
- Entrance fees to Þingvellir National Park and Silfra fissure
- Hot drink after the snorkeling session
Not Included
- Hotel pickup and drop-off
- Personal travel insurance
- Gratuities for guides
- Personal snacks or meals
Important Information
Ready to Experience Iceland from the Inside Out?
Secure your place on this full-day combo tour and discover two of Iceland's most extraordinary natural environments in a single journey.
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