Korallgrottan
Korallgrottan
Korallgrottan is a marble cave at the northernmost tip of Jämtland, near Ankarvattnet, Sweden. It was discovered in 1985. So far, six kilometres of it have been explored, making it Sweden's longest cave.[1][2] Members of the public are not allowed to visit Korallgrottan without a guide.
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Coordinates: 64°52′N 14°06′E / 64.867°N 14.100°E