Spend a day underground and between continents: explore Raufarhólshellir’s lava passages in the morning, then don a drysuit to float through Silfra’s crystal-clear fissure in Þingvellir. Practical, immersive, and geologically revealing.
More ways to explore the area's outdoor wonders
You step off the bus into an Icelandic morning that feels both precise and raw: wind straight from the rift, air that bites and clears your head. The day begins underground at Raufarhólshellir, where a passage of cooled lava stretches for roughly 1.3 kilometers and the cave walls keep a record of fire — bulbous flows, banded colors, and columns like fossilized waves. Headlamps pick out textures and mineral stains; the ceiling hums faintly with the memory of molten rock. Later, after an early lunch and the short drive to Þingvellir, you suit into a drysuit and slip into Silfra’s glass-clear water, floating in a corridor of light that threads between two continents.
Difficulty
moderate
Duration
10 hours (full combo)
Fitness Level
Good general fitness—comfortable walking on uneven lava surfaces and basic swimming ability required for snorkeling.
Wildlife
History
Þingvellir was the site of Iceland’s Alþingi (parliament) from 930 AD and remains a cultural and legal landmark at the rift between continents.
Conservation
Silfra and Þingvellir are protected; tours follow strict rules to prevent contamination and erosion—stick to guides’ instructions and avoid touching rock or flora.
Reserve your spot on the Silfra Fissure Snorkeling & Lava Tunnel Tour - SuperSaver Combo today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Arrive Early for Logistics
Meet at Raufarhólshellir 10–15 minutes early; pickups from Reykjavík can take up to 30 minutes so allow extra time.
Dress in Layers + Bring Dry Clothes
Temperatures vary—warm base layers, windproof outerwear, and a full change of clothes are essential after the snorkel.
Mask & Vision
Snorkel masks don’t fit over glasses; bring contact lenses or a prescription mask if needed.
Respect Silfra’s Rules
No lotions, sunscreen, or touching the rock; the fissure is ecologically sensitive and protected.
Sturdy hiking boots
Good ankle support and grip for uneven lava tunnel floors.
Warm base layers (wool or synthetic)
Retains heat when you’re out of the water and during windy transfers.
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Waterproof outer shell
Wind and occasional rain are common; a breathable shell keeps you comfortable between sites.
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Spare dry clothes and towel
Change of clothes to warm up after the drysuit snorkel and a towel for drying off.