An aerial view as a "supertide" submerges a narrow causeway leading to the Mont Saint-Michel, on France's northern coast, March 21, 2015.
AP
March 22, 2015 5:30 PM EDT

Visitors witnessed Mont Saint-Michel in northwestern France become an island on Saturday, thanks to a rare “supertide” that submerged a causeway that typically provides access to the medieval community. The waters rose some 42 feet (13 meters) and temporarily disconnected the area, which is about 2,000 feet (600 meters) from land.

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