Treehouse World of the Minnesota Treesnakes
Built in a grove of maple trees in Minnesota. Describes how to build a treehouse.
http://www.treesnakes.com

Erik's Treehouses
Treehouse projects in France. All kids are fascinated by treehouses, up there, hosted by a living creature, safe and cosy as within a hand. The dream also often survives in adults.
http://www.laading.net/erik/treehouse/index.htm

Annual World Treehouse Association Convention
Information about coming and past conferences.
http://treehouses.com/conv.html

How the Dandywood Treehouse Came to Be
A step by step description of a treehouse construction in the Protectorate of Dandywood.
http://foxpawpress.com/Treehouse/

Ron & Michelle's Treehouse
Complete treehouse construction site, built without using any nails in the tree.
http://users.adelphia.net/~ironmtnarts/page1.html

Two Marin Playhouses in the Trees
Detailed pictures of two backyard houses built by a hobbyist in Marin County, California. Tips to consider when planning a treehouse.
http://beverlymadera.com/treehouse/tree.html

The Treehouse Guide
Pictures and description of a vertiginous treehouse project by Patrick Fulton. Building advice, designs, book reviews, and examples of other projects.
http://www.thetreehouseguide.com/

Save Our Treehouse
Read about efforts to save a victorian style neighborhood children's treehouse in Clinton, Mississippi.
http://www.saveourtreehouse.com/

Out 'n About
Includes instructions, plans and kits for building a treehouse. Offers consulting services, and rentals in southern Oregon.
http://www.treehouses.com/

Tree Houses Take a Bough
It used to be kid stuff, but these days more and more adults are building in trees to get high.
http://www.smithsonianmagazine.com/issues/1997/august/treehouses.php