Silfra - Thingvellir Lake, National Park Thingvellir, Iceland

© Christopher Hamilton 2011

Silfra is a glacial feed rift that lies between the North American and Eurasian tectonic plates; within a UNESCO world heritage site: National Park Thingvellir, Iceland.  Silfra has a clarity of water that puts a new perspective on the term “good” visibility.