St. Michael's Mount, Cornwall, England.

St Michael's Mount (Cornish: Karrek Loos yn Koos,[1] meaning "grey rock in the woods", also known colloquially by locals as simply the Mount) is a tidal island 366 m (400 yd) off the Mount's Bay coast of Cornwall, England, United Kingdom.

The island has a mix of slate and granite (see Geology below). 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, but radiocarbon dating established the submerging of the hazel wood at about 1700 BC.[2] Historically, St Michael's Mount was a Cornish counterpart of Mont Saint-Michel in Normandy, France (which shares the same tidal island characteristics and the same conical shape), when it was given to the Benedictines, religious order of Mont Saint-Michel, by Edward the Confessor in the 11th century.[5] St Michael's Mount is one of 43 (unbridged) tidal islands which can be walked to from mainland Britain.[6]