St Michael's Mount Causeway and Island
The cobbled causeway from Marazion is accessible for approximately three hours either side of low tide. The crossing is half a mile and takes fifteen minutes; the views of the mount are best on the approach from Marazion at mid-morning light. The island circuit — around the base through the subtropical gardens, to the castle entrance, and back — is half a mile. NT entry applies for castle and gardens. Always check tide tables; a boat runs at high tide.
Tidal island crossing and medieval castle gardens