Jordbrugrotta, Limestone cave in Rana Municipality, Norway.
Jordbrugrotta is a limestone cave in Rana Municipality with multiple levels, large passages, and vertical rock faces reaching about 20 meters high. The system runs through the mountain interior, with marble formations shaped over time into distinctive features.
Local explorers discovered the cave during World War II, and winter expeditions reached about 500 meters into the mountain by 1953. This early exploration established the cave as a notable destination for caving in Norway.
The cave takes its name from the Jordbrua farm in the valley below, linking this natural formation to the farming traditions of the area. The name reflects how closely local people have always connected their settlements to nearby geological features.
Visitors need rubber boats to navigate water-filled sections and rope ladders to reach different elevations throughout the system. Good physical fitness and caution in wet areas are essential for exploring this cave.
The cave features several large glacier potholes partially filled with waist-deep water, formed over centuries through natural erosion in the marble rock. These distinctive basins were carved by flowing water and abrasive material over extended geological time.
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