If the previous bubbletecture building has a low-impact profile it is seriously trumped by this incredible tree house design. Suspended from the natural canopy of the surrounding forests these structures are designed to have the lowest possible environmental impact, relying on multiple points of support without adding too much stress to any one of the surrounding trees. These adult tree houses can be rented or purchased and “uses for these spheres are limited only by ones imagination. Healing, meditation, photography, canopy research, leisure and game watching are just some of the things you can do.” Two are also available for rent in Western Washington. (Source)