The Sierra de Grazalema Natural Park, with 52,000 hectares, is located northeast of the province of Cádiz and northwest of the province of Málaga, in the westernmost massif of the Baetica System. It includes several mountain ranges, among which the Sierra del Pinar, the Sierra del Endrinal, the Sierra del Caíllo, the Sierra de Zafalgar and the Sierra Margarita. Within the limits of the Sierra de Grazalema Natural Park are the municipalities of Grazalema, Zahara de la Sierra, Villaluenga del Rosario, Benaocaz, Ubrique, El Bosque, Prado del Rey and El Gastor, in Cádiz; Benaoján, Montejaque, Cortes de la Frontera, Jimera de Líbar and Ronda, in Málaga. Zahara de la Sierra is a municipality in the province of Cádiz in the hills of Andalusia, southern Spain. It is perched on a mountain, overlooking a valley and a man-made lake formed by the dam that must be driven over to access the town. It is considered to be one of the pueblos blancos or "white towns" because the overwhelming majority of the buildings are white. The town was originally a Moorish outpost, overlooking the valley. Due to its position between Ronda and Seville, it was a perfect site for a castle to be built to serve as a fortress in case of attack. The remains of the Moorish castle still exist. It was ruled by Arabs until 1407. It was recaptured by the Emirate of Granada in 1481. This capture gave a pretext to Castile's war against Granada. It was finally captured by Castilian troops under command of Rodrigo Ponce de León, Duke of Cádiz in 1483. The Garganta Verde canyon is located nearby. The Sierra de Grazalema Natural Park in Cádiz also keeps an interesting historical legacy, housing a large number of archaeological sites and historical remains, from necropolis to chasms. Among the municipalities that make up the Sierra de Grazalema we can see that there are declared six Historic Sites as the town of Benaocaz, the town of Ronda, the town of Zahara de la Sierra, the town of Ubrique, the old town of Grazalema and the population of Algodonales. We also find among the municipalities of the Sierra de Grazalema, Cultural Interest Goods such as the Cabezo de Hortales in Prado del Rey, the Necropolis of the Giants in Ronda, the Castle of Zahara de la Sierra, the Castle of Benaocaz, the Castle of Aznalmara in Ubrique, the Cave of the Pileta in Benaoján, the Hexagonal Tower in Zahara de la Sierra, the Walls of Benaocaz, the Castle of Fátima in Ubrique, the Cave of the Cat in Benaoján and the Agüita Tower in Ronda.