Cologne Cathedral

One of the greatest Gothic cathedrals in the world, begun in 1248 and finished only in 1880. Its twin spires, 157 m high, dominate the city beside the Rhine. Inside are stunning stained glass and the golden Shrine of the Three Kings, said to hold the relics of the Magi.

Climb the 533 steps of the south tower for the view. The cathedral is right next to the main station, so you can see it on a stopover. Cologne is also known for its Kölsch beer, served in small glasses in brewery taverns, and its huge carnival.