Glass Tree House
Most treehouses are built from wood, and use the tree for support. Instead, this Glass Tree House fully encloses a tree inside its walls. The Apple-like curved glass cylinder houses a multi-level structure, accessed by a spiral staircase around the outside. There's a kitchen and bath on the ground floor, a living area above, a bedroom on the third level, and a fourth floor observation deck that provides 360-degree views of the surrounding forest, as well as the rare opportunity to view the top of the internal tree from up close. Obviously a concept, yet grounded just enough to conceivably get built.
Photos: A.Masow Architects