Now you see it. Now you don't. The road that is this unique causeway in France disappears under water about twice everyday for a couple hours.
So, if you're traveling on either side of the road and the tide comes, settle in you could be stuck for there for a while and that's on a day without severe weather.
It's called the Passage Du Gois and is popular among tourists. The road is considered dangerous, signs warn people to avoid the causeway when it's flooded.
But there are those who can't resist, and rescue towers line the road just in case someone makes the trek at the wrong time.
Road in France disappears
Passage du Gois is a disappearing road in France
People stand at the entrance of the Passage du Gois which leads to Noirmoutier island, on April 13, 2011, in Beauvoir-sur-Mer, western France, one of the stages of the 2011 Tour de France cycling race. Running from July 2, to July 24, 2011, the 98th Tour de France will be made up of 21 stages and will cover a total distance of 3.471 kilometres. AFP PHOTO / FRANK PERRY (Photo credit should read FRANK PERRY/AFP/Getty Images)
LES HERBIERS, FRANCE - JULY 02: (FRANCE OUT) Passage de Gois during Stage 1 of the Tour de France on July 2, 2011, Passage du Gois La Barre-de-Monts to Mont des Alouettes Les Herbiers, France. (Photo by James Startt/Agence Zoom/Getty Images)
Passage du Gois, undersea tidal road to Island of Noirmoutier from mainland, Western France