Covers 2,429 ha of freehold land within the Pembrokeshire Coast National Park.
First used by the army in 1939, Castlemartin Training Area was purchased in 1948. It is uses as a direct-fire AFV live gunnery range.
Site of significant archaeological and geological interest, containing 14 scheduled ancient monuments and a fossil record of international significance. It is also home to the highest concentration of seabirds on the Pembrokeshire mainland.