Treehouse expert and visionary Pete Nelson explores the evolution of treehouses through delving into the many shapes and vast variety of functions they've served throughout the years. â€œUltimate Treehouses IIâ€ features a Papua, New Guinea, high-in-the-sky tribal treehouse built by hand, the worldâ€™s oldest backyard treehouse (more than 200 years old), a luxury treehouse gem in New York and a re-purposed airplane fuselage in Costa Rica. The special also spotlights fully suspended biospheres in the wild skies of British Columbia. Follow Peteâ€™s jaw-dropping journey into the past, present and future of treehouse design.
Aired: 14 Feb 2014