Grown Up Tree House

Treehotel is like a set of tree houses for grown ups. Sweden's Boreal Forrest is home to the new eco friendly hotel, inspired by director Jonas Selberg Augustsén’s 2008 documentary Trädälskaren (the Tree Lover). Treehotel, the brainchild of husband and wife team Britta Jonsson-Lindvall and Kent Lindvall, comprises of 7 small, separate buildings.
The small buildings are powered by sustainable electricity and are attached to the trees with a metal clamp (adjustable to fit the tree as it continues to grow) as opposed to screws and nails
The buildings have been designed by some of Sweden's best and most innovative architects including Bertil Harström (winner of the Excellent Swedish Design Award) and Tham & Videgård (the firm behind the Kalmar Museum of Art, another amazing piece of architecture).
The 'Mirror Box Room' is my favorite.

which would damage the trees.