Ecotourism has been developing apace in the sensational Vercors Mountains, where you may spot chamois and ibex, plus the odd edelweiss, on guided walks

At the heart of the range, the Réserve Naturelle Nationale des Hauts Plateaux is the largest national nature reserve in mainland France. Down below, other precious ecological areas to unearth include the Roanne Valley (see Retrouvance) and the Réserve Naturelle des Ramières beside the Drôme River.