Snorkel Silfra and Explore Raufarhólshellir: Full-Day Thingvellir Lava Tunnel Combo
Float between continents in Silfra and walk through one of Iceland's most dramatic lava tunnels in a single, carefully guided day. This combo pairs clear, cold-water snorkeling with an intimate look at volcanic architecture—perfect for travelers who want geology, history, and bold scenery in one trip.
The Experience
Before You Go
Layer up before and after the snorkel
Temperatures are low and your body cools quickly once you leave the drysuit; wear thermal mid-layers and a windproof shell for post-snorkel comfort.
Bring contact lenses if you need vision correction
Snorkel masks supplied cannot accommodate glasses—contacts or a prescription mask are necessary to see clearly underwater.
Know the age and weight rules
Minimum age is 12; weight limits are 45–120 kg and height must be 150–200 cm—check these before booking to avoid disappointment.
Arrive early and review the handbook
Be at meeting points at least 15 minutes early and read the Snorkeling in Silfra Handbook to understand medical and safety requirements.
Local Knowledge
Hidden Gems
- •Walk the short path to the viewing platforms above Silfra for a quiet panorama most groups miss
- •Visit the visitor area near the lava tunnel exit to see recent lava flow features and interpretive panels rarely crowded by tour groups
Wildlife
- •Icelandic horse
- •Arctic fox
Conservation Note
Silfra is ecologically fragile; strict rules limit contaminants and group size to protect water clarity and the fissure's unique ecosystem.
Thingvellir hosted the Alþing from 930 AD, one of the world’s oldest parliamentary sites; the rift valley is the visible split between the Eurasian and North American plates.
Photographer's Notes
- • Inside Raufarhólshellir where light from the entrance meets tunnel shadow
- • Silfra car park short walk to the fissure edge
- • Thingvellir ridge overlooking the rift valley
What to Bring
Warm base layer (merino or synthetic)Essential
Keeps you warm before and after snorkeling when ambient temperatures are low.
Sturdy hiking bootsEssential
Required for traversing uneven lava and wet paths in the cave and park.
Contact lenses or prescription dive mask
Necessary if you require vision correction, since standard masks do not fit over glasses.
Waterproof bag and change of clothesEssential
You will be damp after the swim; a dry change and towel make the drive home comfortable.
Common Questions
Do I need prior snorkeling or diving experience?
No formal diving certification is required; guides train you on technique and safety. You must be able to swim and comfortable in water.
What medical conditions disqualify me?
Pregnancy and certain cardiovascular, respiratory, or spinal conditions may prevent participation; the operator requires medical clearance for listed conditions—see the Silfra handbook.
How cold is the water and will I get hypothermia?
Silfra water is near 2–4°C but you wear an insulated drysuit that minimizes heat loss; follow guide instructions and limit exposure time.
Can I bring a camera underwater?
Underwater photos are provided by the guide free of charge; personal cameras are discouraged due to waterproofing, but drysuit-certified housings are allowed with advance notice.
Is transportation from Reykjavík included?
There is an optional Reykjavík pickup and dropoff; if selected you will be given a pickup time and location list—make arrangements 48 hours ahead.
What happens in bad weather?
Tours may be canceled for safety or poor conditions; the cancellation policy allows a full refund if canceled at least 24 hours before departure.
Book This Experience
Check AvailabilityDuration
10 hours
Location
Thingvellir, Southern Region
Difficulty
moderate
Fitness Level
Moderately fit: you should be comfortable walking on uneven lava, able to climb short ladders and steps, and able to swim in open water.
Ready to Explore Thingvellir?
Book your guided walking tour and discover the hidden stories of this historic mountain city.
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