Castro y castillo de Santa Cruz de la Sierra Monument · Santa Cruz de la Sierra, Comarca de Trujillo, Cáceres Image of Santa Cruz de la Sierra, not of the place itself. Atop the hill overlooking the town, about 62 km from Cáceres, remains survive of a hillfort occupied by pre-Celtic, Celtiberian, Lusitanian and Vettone peoples, along with a necropolis and a castle from the Muslim period with its cistern at the highest point. At the foot of the hill lie the ruins of a 17th-century Augustinian convent. siglo XVII (convento agustino) Photo: losclaudios3 (CC BY-SA 2.0) What to see and do in Santa Cruz de la Sierra