the famous cliffs of etretat in normandy, france, featuring natural porte d'aval arch

etretat coast normandy france attraction pebble beach cliffs sea aval porte manche channel famous arch bay water hill stone french shore overcast dramatic landscape seaside ocean waterfront scenic picturesque travel geology erosion tide rocks scenery coastline sightseeing nature atlantic destination seascape steep abyss limestone natural formation beautiful shoreline breathtaking tranquil peaceful