Treehotel

Kent and Britta Lindvall put the first treeroom up outside Harads in 2010 and commissioned a different Scandinavian architecture practice for each one that followed. The Mirrorcube is wrapped in reflective glass so it disappears into the forest; the Bird's Nest looks like a heap of sticks from outside and is a clean white room within; the 7th Room is a black net slung between two trunks ten metres up.

Hydroelectric power and combustion toilets. Fifty kilometres south of the Arctic Circle, so the northern lights are in season for a good part of the year.

Best for: the one place on this list you would visit for the architecture alone