These are no ordinary treehouses. They are built on very high trees, and you must be brave to live in. You certainly have to be fit to climb to the treehouse ;)
Cedar Creek Treehouse, Ashford, Washington
Treehouses of Korowai and Kombai, West Papua
Green Magic Treehouse, Vythiri, Kerala, India
The Gibbon Experience Treehouses, Bokeo, Laos
Rooftop Treehouse, Amsterdam, Netherlands
Takasugi-an Tea House, Chino, Japan
DIY Treehouse of Yesteryear, Location Unknown
Beach Rock Treehouse, Okinawa, Japan
Inkaterra Canopy Tree House, Tambopata, Peru
Nameless Treehouse, Location Unknown