Tricked-Out Treehouses

Make like a kid and create your ultimate fantasy fort high up in the trees. Pete Nelson, author of New Treehouses of the World, has built more than 200 of these towering hideouts, including Heidi's Treehouse Chalet (pictured) in Poulsbo, Wash.

See what goes in to building a treehouse firsthand on Nelson's new reality TV show, 'Treehouse Men', which premiered September 22 at 10pm on Animal Planet.

Price: $65,000-85,000