The Best Sight in The Rhineland, Germany

This riverside museum south of the cathedral is a real hit. It recounts 3,000 years of civilization's production and enjoyment of chocolate, from the Central American Maya to the colonizing and industrializing Europeans. It's also a real factory, with lava flows of chocolate and a conveyer belt jostling thousands of truffles. The museum shop, with a huge variety of chocolate items, does a brisk business, and the riverside panorama café serves some of the best cake in town.