Lögberg, or Law Rock, was a rocky outcrop in south west Iceland, at the location for the assembly of the country's Althing parliament. The original Althing was gathered at Þingvellir, an area of dramatic landscapes which was easily accessible from the populated areas of the south west.
The exact location of the Lögberg is unknown, because of the changing geography of the rift valley over 1000 years. Two possible locations have been identified in Þingvellir, one a flat ledge at the top of a slope named Hallurinn (currently marked by a flagpole), the other in the Almannagjá fault against a rock wall. A site in the Hestagjá ravine has been put forward as ideal.