Elbe Philharmonic Hall in Hamburg

You're standing at the Elbphilharmonie in Hamburg, known locally as the Elphi. Start by looking at the bottom part: a sturdy brick warehouse, Kaispeicher A, which once stored cocoa, tea and tobacco. On top of it sits a glass structure with a wavy roofline. Some people see a hoisted sail, others a wave, an iceberg or a crystal. The glass façade is made of around a thousand panels, many of them curved, and printed with a pattern. That's why the sky, the water and the city reflect in it differently all the time.