Grønligrotta lies about twenty kilometres north of Mo i Rana, near the farm of Grønlia. A series of tunnels in the limestone rock form a fascinating natural attraction. These are the only illuminated tunnels of their type in the Nordic countries. The main passageway is four hundred metres long and is fully illuminated. Guided tours are available. There are numerous waterfalls and potholes along the way, and opportunities for experienced cavers. There is a cafe, shop and car park here.
