Castlemartin, Pembrokeshire Castlemartin, Pembrokeshire Castlemartin () is a village in (and giving its name to) the Castlemartin Hundred, Pembrokeshire, Wales. It is part of the community of Stackpole and Castlemartin, after amalgamating with Stackpole in 2012, within the Pembrokeshire Coast National Park. The village is on a sandstone ridge, southwest of Pembroke, southeast of Angle, and reached on the B4319 road. In chronostratigraphy, the British sub-stage of the Carboniferous period, the 'Arundian' derives its name from Hobbyhorse Bay in the Castlemartin community"arundo" being the Latin for hobby horse. The village, once centred on a prominent Norman motte-and-bailey castle, together with the original
Pembrokeshire the A477 between Neyland and Pembroke Dock. Large bays are Newport Bay, Fishguard Bay, St Bride's Bay and western Carmarthen Bay. There are several small islands off the Pembrokeshire coast, the largest of which are Ramsey, Grassholm, Skokholm, Skomer and Caldey. There are many known shipwrecks off the Pembrokeshire coast with many more undiscovered. A Viking wreck off The Smalls has protected status. The county has six lifeboat stations, the earliest of which was established in 1822; in 2015 a quarter of all Royal National Lifeboat Institution Welsh rescues took place off the Pembrokeshire coast. Pembrokeshire's diverse range of geological