Walls of Castro Marim

Because of its strategic location (at the mouth of the Guadiana River, which borders the Castle and next to Morocco) Castro Marim suffered many attacks and invasions in the past, so it implemented a defensive policy in the thirteenth century - a fortified wall atop a hill overlooking the city with a Castle inside. The fort has a triangular irregular shape that adapts to the shape of the hillock where it sits, the largest vertex faces south. It has parapet walls around the perimeter that you can stroll watching the panorama. To the west, facing the Guadiana, is a stronghold defended by a low rise revellín.