This idyllic mount part owned by the National Trust is a great day out for your holiday to Cornwall. Like its sister in France (also named Mont Saint Michele) it is only reachable when the tide is out – when a small pathway is revealed to take you right to the mount. Otherwise, you need a boat to cross.
A boat service is available for £2 each way (which is an outrageous price… Just wait for the tides). In minutes you are at the stone port walking along and into the small gathering of buildings. Besides the National Trust, 30 people still live on the island, including the St Aubin family who has lived in the castle since the 1600s.