Ruined tower of a soda factory, built 1914, at the Calanque de l'Erevine, a pebble cove and islet on
the Cote Bleue, seen from a kayak at sea, Bouches-du-Rhone, Provence-Alpes-Cote-d'Azur, France. The Cote Bleue or Blue Coast stretches from Martigues at the Rhone Delta to Marseille. Picture by Manuel Cohen