The Teepott in Warnemünde is a roof with a café underneath. Its swooping concrete shell, a hyperbolic paraboloid if you like geometry, rests on just three columns. A tea pavilion stood on this spot from the 1920s until arson destroyed it in 1945.

East Germany's replacement went up in the late 1960s, reportedly in about seven months. Engineer Ulrich Müther, who made a career of thin concrete shells, designed the roof with architect Erich Kaufmann. It's listed today.

VoiceMap's self-guided audio tour of Warnemünde reaches it beside the lighthouse, straight after the story of those who fled East Germany across the Baltic. The tour notes that the roof is supposedly especially sturdy.