L'Arche de Pommerol (Drôme department). Directions : From the village of "Nyons" drive road D94 for 26km (east) and turn left on road D61. Then drive road D61 for 17km to the little village of "La Charce" (no service). From "La Charce" drive road D338 (south) for 2.600km to the sign "Forêt de l'Eygues" (L'Eygues Forest). The arch is located up on the slope (left) 100 meters above the road. Climb up the talus slope 10 minutes to the arch (no trail). The arch has a span of 20 meters.