Passage du Gois is one of the most dangerous roads in France.
The periodically flooded causeway leads its commuters to the island of Noirmoutier and floods twice a day, for an hour or two.
The two mile, 18th-century road is unique for its length. Before it was built, the only way humans could access Noirmoutier was by boat.
Now, as water comes in at an incredible rate, many visitors find themselves stranded every year.