While this giant tree house isn't necessarily green, it does attempt to bring the essence of nature to the middle of the city. Located in Okinawa, Japan, the life-size banyan tree towers above neighboring building and features a panoramic view.
The tree-house is constructed from concrete and houses the Naha Harbor Diner, featuring pan-Asian cuisine. The restaurant is accessed via an in-trunk elevator, or a spiral staircase around back. Meals are prepared with locally grown and organic harvested food "fresh from the farm."