Nestled within Thingvellir National Park, a UNESCO World Heritage Site steeped in history and geology, the Silfra Fissure offers one of the most extraordinary underwater experiences on the planet. Formed by the slow separation of the North American and Eurasian tectonic plates, Silfra is a living rift — a place where the Earth quite literally pulls itself apart.
What makes Silfra truly breathtaking isn’t just the geography, but the water itself: pristine glacial meltwater, filtered for decades through porous lava rock, fills the fissure with clarity so perfect it feels like flying — not swimming. With visibility exceeding 100 meters, Silfra is widely regarded as one of the clearest dive sites in the world.
And here’s the kicker: you can snorkel or scuba dive directly between two continents. No other location on Earth offers that. The surreal sensation of floating in this icy blue abyss, surrounded by volcanic rock formations and silent beauty, is unlike anything else.
Whether you’re a certified diver chasing rare underwater landscapes, a snorkeling novice seeking a bucket-list thrill, or a curious explorer drawn to Iceland’s natural wonders, Silfra delivers an unforgettable, soul-stirring journey through geological time and glacial purity.
What is Silfra Fissure?
Silfra Fissure is a submerged crack between two continental plates, filled with icy meltwater from the Langjökull glacier. Filtered for decades through underground lava rock, this water is some of the cleanest and clearest on the planet.
It’s the only place in the world where you can literally swim between two continents — the North American plate on one side, the Eurasian on the other. The result? A surreal, slow-motion drift through shimmering blue corridors, cavernous cracks, and otherworldly rock formations.
Location
You’ll find Silfra inside Thingvellir National Park, just under an hour’s drive from Reykjavík. This protected national park isn’t just a geological wonder — it’s also the site of Iceland’s first parliament (Alþingi) and a hotspot for hiking, photography, and eco-tourism.
- Coordinates: 64.255° N, 21.123° W
- Part of the Golden Circle, making it easy to combine with Geysir and Gullfoss
Why Snorkel or Dive in Silfra?
Even if you’ve snorkeled coral reefs or dived in tropical seas, Silfra is different:
Is Silfra Safe?
Yes — Silfra is incredibly safe when experienced with a certified tour provider. Despite its dramatic setting and icy waters, it’s a well-managed and closely regulated dive site that prioritizes safety above all else.
Here’s what makes it a secure experience:
All tours are led by certified, experienced guides trained in cold-water diving, rescue techniques, and local conditions. They accompany every group from start to finish.
Drysuit orientation and safety briefings are mandatory. Before entering the water, you’ll be shown exactly how to use your equipment, what to expect during the dive, and how to stay warm and comfortable.
Emergency protocols are in place, including backup gear, rescue lines, and on-site communication. Guides monitor each guest closely throughout the tour.
The water may be cold (~2–4°C year-round), but it’s clean, calm, and remarkably stable — there are no dangerous currents or wildlife hazards.
All equipment is sanitized and thoroughly inspected before each use. Tour operators take hygiene, fit, and function seriously.
Small group sizes ensure personal attention, allowing guides to quickly assist anyone who feels cold or unsure in the water.
Bonus: The glacial water is so pure you can drink it during your snorkel or dive — and many do! It’s often described as the freshest water they’ve ever tasted.
Pro Tip
You don’t need to be a strong swimmer, just comfortable in water and able to follow instructions. If you have concerns, your guide will adjust the pace to match your comfort level.