Masada is located at the top of an isolated mountain situated on the eastern slopes of the Judean Desert. Its natural fortifications and isolation made it a perfect location for Herod to build a fortress (37-31 BC). Following the tragic death of Masada's defenders during the Great Revolt (73 AD), the fortress fell into Roman hands. Finds include remnants of the Roman siege, palaces, storehouses, baths, a synagogue, a water system and a church from the 4th or 5th century. The site was declared a World Heritage site by UNESCO in 2001.