St Catherine's Island Tenby
St Catherine's Island (Welsh: Ynys Catrin) is a small tidal island linked to Tenby in Pembrokeshire, Wales, by Castle beach at low tide. The island is home to St Catherine's Fort. It is known colloquially as St Catherine's Rock and the area directly in front of it is known as the Catterns.

During the reign of Elizabeth I, the Earl of Pembroke “Jasper” the uncle of Henry VII held the ownership of St Catherine’s Island. At some time the ownership passed to the Corporation of Tenby which took possession of a number of crown lands. It is recorded in 1856 that a few sheep inhabited the island. An observer described them as “half wild sure footed creatures that run, turn and look, run again and leap from crag to crag almost with the agility of the Alpine Chamois”

For many centuries a tiny church was the only building on the Island. The remains of the church were demolished when the fort was constructed in 1867. Information on the finds discovered during the demolition can be found at Tenby Museum and Art Gallery. Since the construction of the fort the island has had several Owners.