TreeHugger has shown a lot of eco-friendly hotels, but the Friend Hotel in Ukraine may well take the prize. Ryntovt Design has built it from what they call "ecologically harmless materials such as clay, reed and wood."
The designer explains in World Architecture News:
All of the furniture and lighting in the hotel are designed by Ryntovt Design themselves. The design is intended to communicate with the environment, the forest and the river. The ecological cover of the building is designed to connect with the natural landscape that surrounds it.
Lots more images at World Architecture News.