Reykjavik: Silfra Fissure Snorkeling & Lava Tunnel Combo

Summary

Snorkel between continents then wander ancient lava tunnels near Reykjavik

You’ll step into Iceland’s raw heart: first wandering Raufarhólshellir’s ancient lava tunnels with a local guide, then floating between continents in Silfra Fissure’s crystal water. Expect cold cheeks, laughter over hot chocolate after snorkeling, and a few moments of pure quiet beneath the surface that might stick with you long after.

What’s the experience like?

We ducked out of the van into a drizzle that felt like it might turn to sleet any minute — classic Iceland. The drive from Reykjavik was short enough for my coffee to stay warm, but long enough for our guide, Jón, to tell us how Raufarhólshellir was formed (something about molten rivers under our feet thousands of years ago). Inside the tunnel, you could actually feel the damp cold settle on your skin. The rocks were slick and streaked with colors I didn’t expect — reds and greens, almost like someone had painted them. Jón’s headlamp flickered once and we all stopped breathing for a second before he laughed it off. I liked how everyone moved quietly, just boots crunching on old lava and someone’s camera clicking now and then.

The real reason I booked this combo tour was Silfra Fissure snorkeling. I’d read you can float between tectonic plates here — North America on one side, Eurasia on the other — but it still felt unreal pulling on the dry suit while Þingvellir’s wind whipped around us. Our divemaster Anna checked everyone’s zippers and cracked a joke about “Icelandic summer” (it was maybe 7°C). The water was so clear it almost messed with my depth perception; you look down and it’s just blue forever. Cold doesn’t really describe it — my lips went numb in seconds — but drifting through that gap, watching sunlight ripple over volcanic rock, I forgot about everything else. Anna snapped photos underwater; I probably looked ridiculous but didn’t care.

Afterward there was hot chocolate waiting (honestly, best part after you can feel your fingers again) and some cookies that tasted way better than they should’ve. People chatted about where they were from; someone tried to pronounce Þingvellir properly and failed spectacularly. I still think about that moment underwater sometimes — how quiet it was except for my own breath echoing in the mask — you know?

Step-by-step itinerary

Day 1 — Lava tunnel and Silfra snorkeling

• Explore Raufarhólshellir lava tunnel
• Travel to Þingvellir National Park
• Snorkel in Silfra Fissure

Top questions

How far is Silfra Fissure from Reykjavik?

Silfra Fissure is about 45 minutes’ drive from Reykjavik.

Is hotel pickup included in this tour?

Yes, there’s an optional Reykjavik transfer with pickup and dropoff available.

Do I need previous snorkeling experience?

No prior experience is required but you must be able to swim.

What should I bring for the day trip?

You should bring warm outdoor clothing, thermal underwear, gloves, hat, hiking shoes, towel, a change of clothes, and packed lunch.

Can children join this Silfra Fissure snorkeling tour?

The minimum age is 12 years old; those under 18 must be accompanied by an adult booked on the same tour.

Are glasses allowed under the snorkeling mask?

No; if you need vision correction bring contact lenses or your own prescription mask.

Is hot chocolate included after snorkeling?

Yes! Hot chocolate and cookies are served after your snorkel at Silfra Fissure.

Is this day trip suitable for people with medical conditions?

Certain conditions require doctor approval; check the provided handbook before booking.

What’s included

Your day includes certified divemaster-led Silfra Fissure snorkeling (with free underwater photos), all caving and snorkeling gear provided onsite, entry to Raufarhólshellir lava tunnel with local guide stories along the way, optional Reykjavik pickup and dropoff for convenience between sites, plus free wi-fi onboard the transfer vehicle. After braving the cold water you’ll warm up with hot chocolate and cookies before heading back toward town.