Les Prs d'Eugnie, Gascony, France
Picture: the spa, courtesy of Les Prs d'Eugnie Eugnie-les-Bains, a sleepy town in south-west France, has all the necessary credentials for a first-rate spa resort (thermal waters, secluded valley setting, diet-friendly food), but in Michel Gurards Les Prs dEugnie it has a stellar one. Feast on three-Michelin-starred food, or opt for the equally tasty low-calorie