Revolving Condominiums?
From a reader, to whom I extend my thanks for this fascinating link:

Suite Vollard: the only revolving building in the world

From the interior of the Suite Vollard building, no landscape is fixed. With the mere pressing of a button, residents of each of the 11 apartments can have 360º panoramic view of the city. Moro, a Curitiba-based construction company, built Suite Vollard. It is a concept-building, and the only revolving building in the world. Architects Bruno de Franco, also technical director with Moro, and Sérgio Silka designed the project, which required the know-how of a large number of professionals in multiple fields of expertise. The complex planning and test phase lasted more than one year. After achieving a perfect balance between mechanical systems that rotate the apartments and the architectonic design, the team chose vinyl window frames as the best technical solution for the facade.
[more, with pictures]