Þingvellir (usual transliteration:Thingvellir ), near the peninsula of Reykjanes and the Hengill volcanic area.

The valley is one of the most important places in Icelandic history. In the year 930, the Alþingi, one of the oldest parliamentary institutions of the world, was founded here.

Þingvellir became a national park in 1928 due to its historical importance, as well as the special tectonic and volcanic environment.

The continental drift can be clearly seen in the cracks or faults which are traversing the region, the biggest one, Almannagjá, being a veritable canyon. This causes also the often measurable earthquakes in the area.

Þingvellir is now a designated UNESCO World Heritage Site.