A few miles from the main trail of the Rhône Valley between Northern Europe and the Mediterranean coast, a Gateway to Provence, Saint-Martin-d'Ardèche lies underneath the beautiful silhouette of medieval Aiguèze at the end of the Ardèche Gorges carved through the limestone plateau de Gras (average 300 m high, culminating at the 719 m high Dent de Rez, i.e. saw tooth) (reïsse=saw in provençal) on 30 kilometers between Vallon-Pont-d'Arc with the magnificent natural stone arch on the river and Saint-Martin-d'Ardèche.