The Arcachon Basin is an immense lagoon (155 km2) which opens out onto the Atlantic Ocean. There are lots of interesting sites to see in this region, such as the Dune du Pyla, the largest sand dune in Europe which is 103 meters high. The view from the top is well worth the climb, with an ocean of green landscape on one side, waves and marine colours on the other. Along with the Cap Ferret lighthouse, the great Dune offers the best panoramic view of the Basin. Other interesting places to visit in the area include the Île aux Oiseaux, which, as its name suggests, is a bird sanctuary placed on an island. This mysterious island at the centre of the Basin is maintained by the famous Cabanes Tchanquées. The Arcachon Basin is also famous for its oyster farming which characterises the life and soul of the region.