St Michael's Mount

St Michael’s Mount is a tidal island (meaning its connected to the mainland by a causeway) off the Mount’s Bay coast of Cornwall, England.  The island is united with the town of Marazion by a man-made causeway created of granite setts, which are passable at mid and low tide, and by boat at high tide.  A medieval church and castle are the oldest buildings on this rocky island and they date back to the 14^th century.  These monastic buildings were built after an earthquake in 1275 destroyed the original priory church.  St Michael’s Mount is one of 43 tidal islands that can be walked to from mainland Britain without a bridge.