Silfra fissure is considered to be one of the most outstanding dive sites on earth. The fissure itself is located at the meeting point between the North American and European continental shelves and as such is the only diving ground where you can dive or snorkel between two shifting tectonic plates. The pure glacial water provides unparallel visibility of over 100 meters. Multi-colored algae adds to the visual splendor offering divers and snorkelers a unique experience unlike any other to be found above ground in Iceland. The water in Silfra fissure runs from Langjökull glacier and undergoes a vigorous 50km long filtration process that can take up to 100 years as it slowly percolates through subterranean lava fields until finally arriving at the underground wells of lake Thingvallavatn. This unique process means that the crystal clear water in Silfra fissure offers some of the best diving visibility in the world and should divers become thirsty it is also completely safe to drink.
Silfra fissure is composed of 4 main sections, Silfra Lagoon, Silfra Deep Crack, Silfra Cathedral and Silfra Hall, which all have their own features. Silfra can reach a depth of 63 meters and is just over one meter wide where it is the most narrow. Divers enter the water from a platform and can expect to dive at a depth of up to 18 meters. Due to its unique geological conditions, as well as its historical and cultural significance, the Thingvellir National Park in Iceland has been declared a UNESCO World Heritage Site. The park offers visitors plenty of options, both above and below ground, and is, therefore, ideal for visitors of all ages and interests.