Before the construction of the Noirmoutier bridge in 1971, the Passage du Gois was the only gateway to the island of Noirmoutier. This legendary route links the commune of Beauvoir-sur-Mer to the island of Noirmoutier, and is unique in that it is revealed as the tides change. Twice a day, for the space of an hour or two, the sea recedes and the paved roadway can be seen and crossed on foot, by car or by bike. And if this submersible road in the Bay of Bourgneuf is unique in the world, it's for its exceptional length of 4.2 km.
