Free Spirit Spheres- Habitat for the Un-Tamed Spirit Free Spirit Spheres explains that "the uses for these durable Spheres are limited only by ones imagination and include: healing, meditation, photography, canopy research, hunting & leisure." Though preferably made to be hung from trees as shown, like a tree house, they can also be hung from any other solid objects or placed in cradles on the ground. Four attachment points on the top of each sphere and another four anchor points on the bottom are each strong enough to carry the weight of the entire sphere and contents. The Spheres skin (made of two laminations of wood strips over laminated wood frames) is waterproof and strong enough to take the impacts that come with life in a dynamic environment such as the forest. This way of living makes me think a lot about Robin's Hood's forest town, but that's just my imagination churning. To give you an idea a Hand Crafted Wood/Fiberglass Sphere which Sleeps 4 in 3 beds, has a countertop stove, sink and refrigerator and is Plumbed and wired for 20 amp, 120/240 volt AC, starts from $120,000. But that's top of the line.