Caldey Island width at its widest. It has an area of and its highest elevation is . The island lies in Carmarthen Bay on the northern side of the Bristol Channel in the county of Pembrokeshire, a little over south of Tenby on the mainland of southwest Wales. It is separated from the mainland by Caldey Sound. A ferry service from Tenby goes to Caldey Island in the spring and summer months when the weather allows. Boats depart every half hour from the harbour at high tide, while at low tide they depart from Castle Beach. Caldey Island consists of two islands
South West Coast Path ruins of Towanroath Mine and the inlet at Chapel Porth. Next are the ruins of Wheal Charlotte mine and then Porthtowan village. After passing Nancekuke firing ranges, the path drops into Portreath, once a busy port serving inland tin mines around Redruth. Beyond lies Carvannel Downs with Samphire Island just off the coast, and then the Reskajeage Downs better known locally as the North Cliffs. Beyond the cove at Hell's Mouth, the path runs northwards to pass around Navax Point and Godrevy Point, offshore from which lies Godrevy Island with its lighthouse. Turning into the wide sweep of St Ives