London Zoo Penguin Pool

Berthold Lubetkin's famous penguin pool at the London Zoo, built in 1934. With its intertwined, spiraling concrete ramps, it was a triumph of sculptural, constructivist-flavored design. It was also rather inhospitable to the penguins, who apparently weren't as excited about the wonders of concrete as Lubetkin. Whoops!!!! It was restored in 1987(I believe) and the penguins moved elsewhere.