Diving is permitted in two submerged rifts in the National Park, Silfra and Davíðsgjá. Silfra is one of the best spots for diving in Iceland and many people find the rift unique on an international scale.
The reason for its fame is the astounding visibility in the clear, cold ground water and the magnificent surroundings. Davíðsgjá is in the north-eastern part of Lake Þingvallavatn. The rift is in the lake itself and to reach it you have to swim some distance. It is quite shallow nearest to the bank, but deepens and widens further out.
Diving permits in Silfra must be obtained before diving or snorkeling. Permits can be obtained either by clicking the below button or at the Information Centre upon arrival.
Thingvellir national park does not offer diving tours or rents out equipment for diving. Multiple dive operators offer tours and services for diving in Silfra and elsewhere in Iceland.