Cologne Triangle

The audio guide to the Cologne Triangle follows what happens on this observation deck when a Rhine storm rolls in, and why staff clear the top floor twenty-eight floors above the ground before it hits. It traces the tower's unusual shape back to architect Dorte Gatermann, who curved its three sides to survive exactly this kind of wind, and explains why engineers favor that constant-width shape for spreading a gust's force evenly. Stand at the glass and look toward the cathedral across the Rhine as you listen.