Calanque de l'Erevine, a pebble cove and islet, , seen from the Sentier des Douaniers path on
the Cote Bleue, Bouches-du-Rhone, Provence-Alpes-Cote-d'Azur, France. The tower is the ruins of a soda factory, built 1914. The Cote Bleue or Blue Coast stretches from the Rhone Delta to Marseille. It is followed by a railway track and also, from Niolon to Cap Mejan, the Sentier des Douaniers or Sentier du Littoral, a 28km long distance hiking trail, following the route walked by customs officers checking the coastline for smugglers. Picture by Manuel Cohen