One of the most unique buildings you'll see all day: Casa Mila in Barcelona,Spain.

Casa Milà, better known is a building designed by the Catalan architect Antoni Gaudí and built during the years 1906–1912. It was a controversial design at the time for the bold forms of the undulating stone facade and wrought iron decoration of the balconies and windows, designed largely by Josep Maria Jujol, who also created some of the plaster ceilings.