History of Silfra Fissure
Silfra lies within Thingvellir National Park, the historic site where Iceland’s national parliament, the Alþingi, was established in 930 AD. For nearly 800 years, chieftains gathered here each summer to debate laws, settle disputes, and shape the nation.
The fissure as we know it today was created after a series of powerful earthquakes in 1789 widened existing cracks in the lava field. These seismic events opened deep fractures between the tectonic plates, allowing glacial meltwater to fill the newly formed canyon.
It wasn’t until the late 20th century that divers began exploring the fissure, drawn by reports of extraordinary water clarity. Word spread quickly within the diving community, and Silfra gained international attention as a rare place where people could float between two continents in freshwater with visibility often exceeding 100 meters.
Today, Silfra is protected as part of Thingvellir National Park, a UNESCO World Heritage Site recognized for both its geological significance and its role in Icelandic history.