See DANCING HOUSE, Czech Republic

Dancing House (Tan??c? d?m) occupies a fine position by the Vltava River. This stunning building, constructed between 1992-1996, is somewhat of a rarity in Prague: a modern, glass building surrounded by historic architecture.

Architecture
The very non-traditional design was controversial at the time. Czech president V?clav Havel, who lived for decades next to the site, had supported it, hoping that the building would become a center of cultural activity.Originally named Fred and Ginger (after Fred Astaire and Ginger Rogers - the house vaguely resembles a pair of dancers) the house stands out among the Neo-Baroque, Neo-Gothic and Art Nouveau buildings for which Prague is famous.

Restaurant on the top of the roof
The top floor of Dancing House is the only part open to the public, and is home to one of the city's leading restaurants, Celeste Restaurant. Diners at Celeste can expect a real treat. This celebrated restaurant offers delightful cuisine and magnificent views over the river and up to Prague Castle.
Source:  pragueexperience.com