This stone paved causeway was first used during the 16th century to access the island of Noirmoutier. ‘Passage du Gois’ is a 4km long causeway in northern France that is only accessible twice a day for 3 hours during low tide (a bridge also connects the island to the mainland). Every year, a foot race ‘the Foulées du Gois’ is held across it, starting at the onset of the high tide.