Slip into the crystal-clear fissure where the North American and Eurasian plates meet and drift weightlessly through 100-metre visibility water — one of the world's top-ranked bucket-list dives and snorkels. The colours and clarity are simply otherworldly.
What to expect
You're kitted into a sealed dry suit at the water's edge and then slip into water so pure it's drinkable. The fissure narrows to cathedral-like corridors of lava rock draped in vivid green and purple algae, before opening into the famous Lagoon. The silence, the weightlessness, and the impossibly blue depth below you create a meditative calm unlike any other water experience. Your guide photographs the moment and briefs you on the geology before and after the drift.
Good to know
Book the first-morning slot directly on dive.is to beat day-visitor crowds. No swimming experience required but participants must be in reasonable health; dry suits keep you warm. Allow 3 hours door-to-door from port.