The world's only completely revolving tower in Curitiba, Brazil

Yahoo! News has more details,

"An unusual apartment building was inaugurated in Brazil, each of whose 11 storeys turns independently, giving lucky residents 360-degree views of the eco-friendly city of Curitiba.

The building is located in a residential neighborhood called Ecoville, in the capital of the southern state of Parana.

It was billed as "the world's only completely revolving tower."