Back in 2020, Norwegian architecture studio Helen & Hard completed two Woodnest treehouses, a unique concept which saw the cabins anchored to living pine trees on the steep hillsides of Odda, Norway.

The "Copper Fox Treehouse" is the most wish listed home in Maine, according to AirBnb rankings. True to its name, the treehouse is shaped like a fox and includes fox finishings inside. Other top wish ...