How to Build a Treehouse. A treehouse can be a magical hideaway, fort, or play destination for almost any child, as well as a fun project for any adult. Building a treehouse takes careful planning and construction, but your hard work will.
The tree house 'bird apartment' by Nendo, located in a forest in Komoro City in Japan's mountainous Nagano Prefecture. The treehouse has entrances to 78 nest spaces on one side, and a viewing space for one person on the other.