For spectacular views, climb this large fortress, built by the Moors in the 9th century on top of old Roman foundations. To the south are silos, warehouses, and residential neighborhoods. To the north are green fields and brilliant flowers, partitioned by a maze of nearly leveled Roman stone walls, and an ancient cistern. The castle's size underscores the historic importance of now-tiny Trujillo.
Cerro Cabeza de Zorro, Trujillo, 10200, Spain