Torghatten mountain (258 m high (846 ft)) is on the island of Torget in the south-west of Brønnøy municipality. It is famous for its characteristic hole that goes right through the mountain.
This hole, which is 160 metres long (525 ft), 35 metres high (115 ft) and 20 metres wide (66 ft), was created during the Ice Age. Ice and water gradually eroded away the loose rock, while the harder rock around the top of the mountain remained. The result was a hole the size of a grand cathedral. READ MORE about TORGHATTEN MOUNTAIN
Source: visithelgeland.com / Norway Today