Treehouses aren't just for kids anymore...they're also for the kid in all of us! They've grown from backyard playhouses to sustainable family dwellings, as these pictures illustrate.

Adobe | Barefoot Builder | Cal Earth | Cob | Roger Dean | Earthbags | Earthships | Chuck Hall | James Hubbell | Landscape Treatments | Rammed Earth | Stone | Straw Bale | Treehouses |