Þingvellir

Þingvellir (Thingvellir) National Park is a protected rift valley and historic site in southwest Iceland where the Icelandic Althing parliament met from about 930 AD. It is notable for its visible tectonic plate boundaries and cultural importance in Icelandic history.

Geomorphological highlights include the Almannagjá gorge and other fissures formed by the divergence of the North American and Eurasian plates; many of these features are accessible via walking trails. The Silfra fissure is a world-class snorkeling and diving site with clear glacial water and exceptional underwater visibility.

Cultural highlights centre on the medieval parliament site, where the Lögberg or Law Rock served as the open-air platform for assemblies; interpretation panels and marked routes explain the site’s political and legal role in early Iceland. Trails circle the lake Þingvallavatn, the country’s largest natural lake, which lies within the park.

The site was established as the meeting place of the Icelandic Althing from about AD 930 and remained the national assembly location for centuries. Geological processes have continued to shape the landscape, producing the rifts and fissures visible today.

Þingvellir lies northeast of Reykjavík within the broader Golden Circle region, set in a rift valley around the shores of Þingvallavatn and surrounded by lava fields and low mountains. It is managed as a national park with marked trails and visitor facilities.

• Geology and history: The national park combines geological and cultural significance - it contains the Althing assembly site founded in 930 AD and visible tectonic rifts where visitors can walk between continental plates.

What to See #

• Silfra fissure: Silfra fissure, a crack between the North American and Eurasian tectonic plates, is a popular site for snorkeling and diving with exceptionally clear glacial water and visibility often exceeding 100 metres.
• Rift and assembly site: Almannagjá and other rift features form a visible gorge where the continental plates diverge; the historic assembly site Lögberg (Law Rock) is located nearby within the park.