Exploring Iceland’s Leiðarendi Lava Tube and Silfra Fissure: Caving Meets Snorkeling Adventure
Step into Iceland’s volcanic depths and glacial waters on a unique combined adventure through Leiðarendi lava tube and Silfra Fissure. This guided tour blends accessible caving with unparalleled snorkeling between continents, offering an immersive experience of Iceland’s dynamic geology and pristine nature.
The Experience
Before You Go
Prepare for tight dry suits
Dry suits can feel constricting, especially around the neck and wrists; wear thermal layers and wool socks for comfort.
Bring swimwear and a towel
If selecting the wetsuit option, swimwear is required underneath and a towel helps afterward.
Wear sturdy footwear
Supportive shoes with grip are recommended for walking inside the lava tube’s uneven terrain.
Eat a good breakfast
This full-day activity requires energy—start with a nourishing meal before pickup.
Local Knowledge
Hidden Gems
- •Climb nearby Öxarárfoss waterfall for a quiet perspective of the park
- •Inspect ancient Alþingi parliament remains within Þingvellir National Park
Wildlife
- •Arctic foxes occasionally roam the lava fields
- •Brown trout can be spotted in Silfra’s crystal waters
Conservation Note
Silfra snorkeling operates under strict environmental controls to preserve the purity of the glacial water and protect the fragile underwater ecosystems.
Þingvellir was the site of Iceland’s first parliament established in 930 AD, creating one of the world’s oldest democratic institutions outdoors under open sky.
Photographer's Notes
- • Inside Leiðarendi cave entrances
- • The split between tectonic plates at Silfra
- • Öxarárfoss waterfall within Þingvellir
What to Bring
Thermal underwearEssential
Provides critical insulation when wearing a dry suit in cold water.
Wool socksEssential
Keep feet warm inside cumbersome dry suits during cold-weather tours.
Waterproof gloves
Protect your hands from cold air and water during snorkeling and cave exploration.
Water-resistant outer layer
Useful for staying dry while transitioning between caving and snorkeling gear.
Common Questions
Is prior diving experience required for snorkeling in Silfra?
No diving license or prior diving experience is needed; a basic swimming ability and comfort in water are sufficient.
What physical condition do I need?
Moderate fitness is recommended to handle light crawling in the lava tube and swimming in cold water.
What is the water temperature in Silfra?
Water temperature remains around 2–4°C (36–39°F) year-round, requiring thermal protection like dry suits.
Are photos included?
Yes, underwater photographs are provided free as part of the tour package.
How long is the cave portion?
Leiðarendi tunnel exploration lasts approximately 90 minutes, featuring some crawling but generally accessible terrain.
Can I participate if I have claustrophobia?
This experience involves some tight, confined spaces; it is not recommended for those with claustrophobia.
Book This Experience
Check AvailabilityDuration
6–7 hours
Location
Reykjavik, null
Difficulty
moderate
Fitness Level
Participants should be in moderate physical shape able to crawl, walk uneven terrain, and swim comfortably in cold water.
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