Norway's largest collection of limestone caves are located just north of Mo i Rana. Both Grønligrotta cave and Setergrotta cave are available for tourists to explore. Grønligrotta cave is the only lit cave in Scandinavia and a perfect choice for families. During high season guided tours are available daily. The Setergrotta cave is for the more adventurous with its impressive cave formations, sinkholes and rivers.