Where I grew up in Tokyo, there was never enough room to build a treehouse; I was always envious of kids in America, who all seemed to have one in their giant backyard. (Of course, I know now this is not true.) Looking through the portfolio of German architecture firm Baumraum as me wishing once again that I had one — they've created a series of beautiful modern treehouses made with simple materials for fancy clients. Commissioning a treehouse from these wood construction experts costs upwards of $25,000 and takes three to seven months to build, depending on the health of the tree and complexity of design.
Baumraum (via Apartment Therapy)