Silfra Fissure Snorkeling & Raufarhólshellir Lava Tunnel Combo from Reykjavík
Combine subterranean lava caving with one of the world’s rarest snorkeling spots: float in crystal water between continental plates at Silfra and explore the raw sculpted tunnels of Raufarhólshellir. This full-day combo from Reykjavík pairs geology, history and hands-on adventure.
The Experience
Before You Go
Arrive Early for Both Meeting Points
Allow 15–30 minutes to find parking at Thingvellir P5 and to check in at Raufarhólshellir; guides leave promptly.
Dress in Layers and Bring a Change
Temperatures vary dramatically—wear thermal base layers for both the cave and post-snorkel; bring dry clothes and a towel.
Protect Your Eyesight
You can’t wear glasses under snorkeling goggles; bring contact lenses or prescription snorkeling goggles if needed.
Respect Water Quality
Do not apply sunscreen or lotions before snorkeling—Silfra’s water is a protected, filtered glacial source and contamination is a real risk.
Local Knowledge
Hidden Gems
- •Bakarameistarinn bakery in Reykjavík — the casual midday pick-up spot for the combo and a good place to taste Icelandic rye and pastries
- •Almannagjá gorge viewpoint — a short walk from Silfra offering dramatic rift-valley perspectives without the crowds
Wildlife
- •Brown trout and small char visible in Silfra’s clear water
- •Arctic fox (rarely seen) and numerous bird species around Þingvellir
Conservation Note
Silfra’s water is exceptionally pure and ecologically sensitive — guides enforce strict rules to prevent contamination and visitors should avoid lotions and unnecessary touching of rock or vegetation.
Þingvellir is the historic site of Iceland’s parliament (Alþingi), founded in 930 AD; its rift valley also marks the slow divergence of the Eurasian and North American plates.
Photographer's Notes
- • Entrance and interior sections of Raufarhólshellir showing lava textures
- • Silfra car park trail where the fissure and rift valley open up
- • Almannagjá gorge overlook for wide rift shots
What to Bring
Thermal base layersEssential
Retain warmth before and after snorkeling and while walking to sites.
Sturdy hiking shoesEssential
Required for the lava tunnel approach and uneven terrain near parking areas.
Swimwear and quick-dry towelEssential
Wear under the dry suit and have a towel/change of clothes for after the snorkel.
Prescription snorkel goggles or contacts
Necessary if you normally wear glasses—goggles must seal directly to the face.
Common Questions
What is the minimum age to join?
Minimum age is 12; guests under 18 must be accompanied by a parent or guardian booked on the same tour.
Do I need prior snorkeling experience?
No formal snorkeling experience is required, but you must be comfortable in the water and able to swim.
Are wetsuits provided?
Guides provide dry suits, hoods, gloves and boots for Silfra and all necessary caving helmets and lights for Raufarhólshellir.
What are the weight and height limits?
Weight limit: 45–120 kg; height limit: 150–200 cm. Guests outside these ranges should contact the operator in advance.
How cold is the water and how long is the snorkel?
Silfra’s water is near 2–4°C; the dry suit keeps you insulated. The guided snorkel typically involves a 30–60 minute water time with short swims of several hundred meters.
What happens if the weather is bad?
Tours may be canceled due to weather; the operator offers a full refund if canceled at least 24 hours before departure or if conditions prevent safe operation.
Book This Experience
Check AvailabilityDuration
10 hours
Location
Thingvellir / Reykjavík, Capital Region
Difficulty
moderate
Fitness Level
Moderate fitness; you should be comfortable walking uneven cave floors and floating for 30–60 minutes while wearing a dry suit
Ready to Explore Thingvellir / Reykjavík?
Book your guided walking tour and discover the hidden stories of this historic mountain city.
Check Availability & Book Now