St Michael's Mount

St Michael's Mount (Cornish name: Carrack Looz en Cooz) is a lofty pyramidal tidal island, exhibiting a curious combination of slate and granite, rising 400 yards (366 m) from the shore of Mount's Bay, situated in Penwith in west Cornwall, England, United Kingdom, in the extreme south western peninsula of the island of Britain. It is united with Marazion by a natural causeway cast up by the sea and passable only at low tide.

Its Cornish language name — literally, "the grey rock in the wood" — may represent a folk memory of a time before Mount's Bay was flooded. Certainly, the Cornish name would be an accurate description of the Mount set in woodland. Remains of trees have been seen at low tides following storms on the beach at Perranuthnoe. The Cornish legend of Lyonesse, an ancient kingdom said to have extended from Penwith toward the Isles of Scilly, also talks of land being inundated by the sea.

Historically, St Michael's Mount was a Cornish counterpart of Mont Saint Michel in Normandy, France.

St Michael's Mount is known colloquially by locals as simply the Mount.