The Mont Saint Michel is an island on which stands a beautiful monastery. The island was just 600m from the shorte, so it was easily accessible at low tide, but impossible to besiege as all the surrounding area was under water at high tide. It resisted several attacks, including one by the English forces during the Hundred Years war.
The Mont Saint Michel is now a UNESCO World Heritage and attracks 3 million tourists a year. In recent years, the road linking the island to the shore has been replaced by a light bridge, enabling water to flow freely under some of its portions, which was previousely impossible.
