Skonseng, Italy
Grønnligrotta is a marble karst cave in Rana Municipality in Nordland county, Norway. It is located in the valley of Røvassdalen, and was first explored in 1914. It has a total depth of 107 metres (351 ft) and explored length of 2 kilometres (1.2 mi). It is probably connected to the nearby Setergrot
ta. The cave is equipped with artificial lights and open for tourists.
Listen to the audio guide for Grønligrotta Free on WIP — starts by itself when you arrive, even with the screen off