[2] The bay was listed as a UNESCO world heritage site in 1979 for its aesthetic quality and its importance to the Christian tradition.

[3] Due to the significant tidal movements in this region (over 10 meters) a large part of the bay is uncovered at low tide.

The tides have been described by Victor Hugo as "à la vitesse d'un cheval au galop (as swiftly as a galloping horse)".

Between "Pointe de Château-Richeux" and Mont Saint-Broladre seashell deposits have been used to create levees around Dol marsh.

In 1856, M. Mosselman, founder of the "Cie des Polders de l'Ouest", was given a concession to cultivate 3,800 hectares of shoreline between Sainte-Anne chapel, Moidrey bay, Roche-Torin and the Mont Saint Michel.