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 Wales Coast and Severn Estuary Coastal Path Landscapes: Merthyr Mawr and Kenfig Margam Burrows (which stretches from Neath Port Talbot through Bridgend to Vale of Glamorgan), Caldicot and Wentloog Levels (Cardiff, Newport, Monmouthshire), and Lower Wye Valley (Monmouthshire). South Wales Coast and Severn Estuary Coastal Path The South Wales Coast and Severn Estuary Coastal Path covers Region H of the larger Wales Coast Path, an long-distance walking route around the whole coast of Wales which opened on 5 May 2012. The South Wales Coast and Severn Estuary stretch is a in length running from Kenfig Dunes near Port Talbot, South Wales to Chepstow. With five local councils