L'Arche des Portettes (Alpes de Haute-Provence county). This arch is located above the small village of "Annot" on a beautiful area of grey sandstone among a forest of chestnut trees. Directions : From the little railway station of Annot, cross under the railway tunnel and at hiking sign "Circuit des gres d'Annot" walk up the yellow marked trail 1 hour to the arch. The trail cross under the arch. IGN topographic map Top25 number 3541 west "Annot" (pleat D9).