Saint Michael's Mount is a tidal island in Mount's Bay, Cornwall, United Kingdom. The island is a civil parish and is linked to the town of Marazion by a man-made causeway of granite setts, passable between mid-tide and low water. It is managed by the National Trust, and the castle and chapel have been the home of the St Aubyn family since approximately 1650.
Historically, St Michael's Mount was a Cornish counterpart of Mont-Saint-Michel in Normandy, France (with which it shares the same tidal island characteristics and the same conical shape, though it is much smaller, at 57 acres, than Mont St Michel which covers 247 acres, when it was given to the Benedictine religious order of Mont Saint-Michel by Edward the Confessor in the 11th century.
St Michael's Mount is one of 43 unbridged tidal islands that one can walk to from mainland Britain. Part of the island was designated as a Site of Special Scientific Interest in 1995 for its geology.
- Wikipedia