The Essential
Chaudfontaine, in the Vesdre valley, has been a popular spa town since the late 17C. Its hot springs (36.6°), the only ones in Belgium, are helpful for treating rheumatism. The resort also boasts an open-roof hot-spring pool and a casino with a mini-golf course. In the Parc des Sources, learn about the mysteries of freshwater at Source O Rama.