Black & Blue - Lava Tunnel + Silfra Snorkelling from Reykjavik
Black & Blue: Lava Tunnel & Silfra Snorkelling Tour from Reykjavík
Duration: 10 hours
Difficulty: Moderate
Available: Year-round
Pickup: Reykjavík hotels & bus stops
Experience Iceland’s most dramatic natural contrasts on this unforgettable geological adventure from Reykjavík. The Black & Blue Lava Tunnel & Silfra Snorkeling Tour combines two of Iceland’s most iconic experiences into one value-packed day: exploring an ancient lava tunnel formed by volcanic eruptions and snorkeling between two tectonic plates in the clearest water on Earth.
Your journey begins beneath the surface at Raufarhólshellir Lava Tunnel, one of Iceland’s longest and most impressive lava tubes. Formed over 5,000 years ago, this subterranean world reveals the raw inner workings of a volcanic eruption. Walk through vast caverns, admire colorful mineral deposits, and learn how Iceland’s volcanic forces shaped the island.
After returning briefly to Reykjavík, the adventure continues at Þingvellir National Park, a UNESCO World Heritage Site. Here you’ll snorkel in the legendary Silfra Fissure, floating effortlessly between the North American and Eurasian tectonic plates. Fed by glacial meltwater from Langjökull glacier and naturally filtered through lava fields, Silfra boasts up to 150 meters of visibility, making it one of the world’s top snorkeling and dive sites.
This tour is perfect for adventurous travelers seeking Iceland snorkeling, lava cave exploration, and once-in-a-lifetime photo opportunities, both above and below the surface.
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Pickup & drop-off from Reykjavík hotels or nearby bus stops
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Guided tour of Raufarhólshellir Lava Tunnel with an expert caving guide
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Silfra snorkeling tour with a certified PADI Divemaster
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All required snorkeling, dry suit, safety & caving equipment
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Þingvellir National Park entrance fee
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Free underwater photos taken by your guide
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Hot chocolate & cookies after snorkeling
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English-speaking professional guides throughout the tour