St Michael's Mount - A historic tidal island with castle and causeway in Cornwall.

St Michael's Mount is a remarkable tidal island located in Mount's Bay, Cornwall, connected to the mainland town of Marazion by a historic granite causeway. Walkable at low tide, this unique setting offers one of the most iconic and memorable experiences for visitors exploring things to do in Cornwall.

Managed by the National Trust, the island is home to a striking medieval castle and chapel that have been the residence of the St Aubyn family since around 1650. The earliest buildings date back to the 12th century, and visitors can explore centuries of history while enjoying panoramic views across the Cornish coastline.

The island's Cornish name, meaning "the grey rock in a wood", hints at its ancient past when the surrounding bay was once forested. Evidence of this can still be seen today, with remnants of ancient woodland occasionally revealed at low tide. St Michael's Mount is also recognised for its geological importance and was designated a Site of Special Scientific Interest.

As one of only a small number of tidal islands in Britain accessible on foot, it offers a truly unique day out combining history, nature and coastal beauty. Visitors can walk the causeway at low tide or take a short boat trip when the tide is in.

Plan your visit to St Michael's Mount and discover one of Cornwall's most iconic landmarks.

Find directions easily using Google Maps.