Emmanuel Grymonpré has invented a new style of treehouse. The shelters he's built in trees overlooking the Spanish Pyrenees don't rely on any ground support. Instead they're suspended like birdcages over 20 feet in the air by simple cables.
In 1974, fresh out of the army, Michael Garnier went to rural Oregon to make a living off the woods. He made furniture, fences and pole barns, but it was a treehouse that got him all the attention.