The photos shown here are of Sheraton Huzhou Hot Spring Resort in Huzhou, China. At a total building cost of $1.5 billion, each of its 27 floors cost $55 million to construct. The logistics of building such a structure in a lake, as well as the shape of the building added to the expense. The hotel features, among other things, a full spa, hot springs and indoor and outdoor pools.
Read about the world's eight other most expensive buildings here.
Images: Starwood Hotels