Grábrók, Volcanic crater in Borgarfjörður, Iceland.
The crater rises 170 meters above ground level, featuring steep slopes and a circular rim overlooking Lake Hreðavatn and moss-covered lava fields.
The volcanic eruption that formed Grábrók occurred 3400 years ago, creating a lava field that altered the Norðurárdalur valley and formed Lake Hreðavatn.
The protected nature preserve includes Grábrók and its surrounding lava fields, representing Iceland's commitment to geological conservation since 1962.
A maintained path leads visitors from the parking area to the summit, with stairs and viewing platforms allowing safe exploration of the crater.
The lava flow from Grábrók covers 7 square kilometers with an average thickness of 20 meters, forming a distinct AA lava pattern.
Elevation above the sea: 170 m
GPS coordinates: 64.78170,-21.56226
Latest update: March 2, 2025 21:01
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