Thingvellir National Park (icelandic: Þingvellir) is famous for several reasons.
First of all, Thingvellir is associated with the national parliament of Iceland, which was established in 930 AD. Sessions were held at Thingvellier until the end of 18th century. The unique landscape was used as a natural amphitheater, which was perfect for public speeches. Just imagine that instead of sitting in a building the politicians just gathered together on the grass! Since 2004 Thingvellir is a UNESCO World Heritage Site based on cultural criteria.