Þingvellir National Park

Þingvellir National Park, located roughly 45 kilometres east of Reykjavik in a rift valley formed by the diverging North American and Eurasian tectonic plates, is the site where the Althing—Iceland's national parliament—was founded in 930 AD, making it one of the oldest continuous parliamentary institutions in the world. Free-standing chieftains (goðar) gathered here annually for two weeks each summer until 1798, reciting laws from memory at the Lögberg (Law Rock) and settling disputes, alliances, and criminal cases before an assembly of the whole nation. The valley preserves visible remains of booth foundations—the turf-and-stone shelters used by families attending the assembly—scattered along the Öxará river and the base of the Almannagjá gorge. Þingvellir was also the site in 1000 AD where Iceland formally adopted Christianity as its official religion, a decision reached by the lawspeaker Þorgeir Ljósvetningagoði after a period of ritual seclusion, allowing pagan practice to continue privately to avoid civil war. In 1944, the Republic of Iceland was proclaimed at Þingvellir, marking full independence from Denmark. The site's curatorial approach favours minimal intervention: the landscape itself, walking paths through the rift, and interpretive signage at the visitor centre convey the historical narrative rather than reconstructed buildings. Þingvellir was designated a national park in 1930 to mark the millennium of the Althing and was inscribed as a UNESCO World Heritage Site in 2004 for its combination of natural and cultural significance. The Öxará river, which flows through the park and over a waterfall into the rift, was historically used for executions and ordeals, including the drowning of women convicted of infanticide or adultery. Preservation work has focused on protecting the fragile booth ruins from erosion caused by heavy foot traffic, with boardwalks installed along the most-visited sections of the Almannagjá gorge.