Beneath the Island that Tintagel Castle is situated runs a cave which can be accessed via the beach at low tide. The cave runs right through the island and daylight pours in at both ends.
This cave has for many years been associated with Merlin through local legend and it is now named Merlin’s Cave.
Merlin’s Cave is approximately 100 metres long and runs completely through Tintagel Island from Tinagel Haven on the east to West Cove on the west.
Tennyson bought Merlin's Cave into the spotlight in his famous work, Idylls of the King, in which he describes waves bringing the infant Arthur to the shore and Merlin bearing him to safety.