1 Best Sight in The Basque Country, Gascony, and Hautes-Pyrenees, France

This therapeutic station thermale is certified by the French Ministry of Health to treat digestive, urinary, and metabolic problems, as well as rheumatism. Three-week "cures" are prescribed by doctors and covered by national health insurance. But foreign visitors can sign up for weight-loss retreats or simply enjoy a restorative stint in healing baths filled with 39°C (102°F) water that comes from nearly 1,300 feet below the surface.