Mountain farm hut / hunting cabin / boathouse

Map symbol explained: a black triangle can mean anything from an old støl, hunting cabin or seter to an old stone hut. A boathouse or emergency shelter can also be marked with a black triangle. These buildings usually have a lower standard than ordinary cabins.

A stone hut standing entirely on its own in the mountains. Map: Screenshot from norgeskart.no

Here the triangles are old støler. Map: Screenshot from norgeskart.no