Climb Strasbourg Cathedral's Spire Platform + Catch the Astronomical Clock
Haul yourself up 332 sandstone steps of the world's onetime tallest building to the spire platform, 66 meters over a sea of red rooftops, the Ill canals, the Vosges and — on a clear day — the Black Forest. Down in the nave, time your visit for the 12:30pm show when the 16th-century Astronomical Clock's gilded figures, apostles and crowing rooster wheel into motion. This is the defining image of Alsace and the one thing a first-timer would genuinely regret skipping.