Grønnligrotta is a

marble Marble is a metamorphic rock consisting of carbonate minerals (most commonly calcite (CaCO3) or Dolomite (mineral), dolomite (CaMg(CO3)2) that have recrystallized under the influence of heat and pressure. It has a crystalline texture, and is ty ...

karst cave Karst () is a topography formed from the dissolution of soluble carbonate rocks such as limestone and dolomite. It is characterized by features like poljes above and drainage systems with sinkholes and caves underground. There is some eviden ...

Rana Municipality or is a municipality in Nordland county, Norway. It is part of the Helgeland traditional region. The administrative centre of the municipality is the town of Mo i Rana, which houses the National Library of Norway. Other population centers in R ...

Nordland Nordland (; , , , ) is one of the three northernmost Counties of Norway, counties in Norway in the Northern Norway region, bordering Troms in the north, Trøndelag in the south, Norrbotten County in Sweden to the east, Västerbotten County to t ...

county,

Norway Norway, officially the Kingdom of Norway, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. The remote Arctic island of Jan Mayen and the archipelago of Svalbard also form part of the Kingdom of ...

. It is located in the valley of

Røvassdalen Røvassdalen is a valley in Rana Municipality in Nordland county, Norway. The upper part of the valley is located within the Saltfjellet–Svartisen National Park. The river of Røvassåga flows through the valley, and later it joins with the ri ...

, and was first explored in 1914. It has a total depth of and explored length of . It is probably connected to the nearby

Setergrotta Setergrotta (or Setergrotten) is a karst cave in Røvassdalen in Rana Municipality in Nordland county, Norway Norway, officially the Kingdom of Norway, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern ...

. The cave is equipped with artificial lights and open for tourists.

References

Caves of Norway Marble caves Landforms of Nordland Rana, Norway Tourist attractions in Nordland {{nordland-geo-stub