Located in the Þingvallavatn Lake in the Þingvellir National Park in Iceland, Silfra is a rift that is part of the divergent tectonic boundary between the North American and Eurasian plates.
The rift offers amazing visibility reaching 70–80 meters. Diving tour operators often make claims of 150 to 300 meters; but it is impossible to verify this claim, as the view is never obstructed by the visibility, you can simply see "to the other side" from any point you are.
