2 Best Sights in The Rhineland, Germany

Southeast of the cathedral and the site of the city's tourist-information center is an arcaded, neoclassical structure built in 1822. The central pavilion contains two fountains with thermal water—the hottest north of the Alps—that is reputed to help cure a wide range of ailments in those who drink it. If you can brave a gulp of the sulfurous water, you'll be emulating the likes of Dürer, Frederick the Great, and Charlemagne.

Fifteen of Wiesbaden's 26 springs converge at the steaming Kochbrunnen Fountain, where the sulfurous but at least theoretically healthful waters are there for the tasting.