Discover Banc d'Arguin and dune of pilat Sandy Ocean Island in the nature reserve. The tallest sand dune in Europe is the dune of Pilat in Arcachon bay. The dune is 60 km from the city of Bordeaux. The dune of Pilat is also familiarly known as dune of pyla. Dune of Pilat’s prominence The dune of Pilat is a …