(images via: Green Roofs)
The Songjiang Hotel by Atkins Design makes use of a beautiful water-filled quarry in the Songjiang district just outside Shanghai in China. This innovative design features a green roof, geothermal energy and underwater areas including a restaurant and guest rooms. The quarry provides an ideal setting for sports and leisure including swimming, water sports, rock climbing and bungee jumping. The Songjiang Hotel was originally slated to be completed by May 2009, but as of now it’s still just a concept.