Desert castles, also known as desert palaces, are historical structures found primarily in the Middle East, particularly in Jordan and Syria. Built during the Umayyad period (661-750 AD), these castles served various purposes, including royal retreats, caravanserais, and military outposts. They are characterized by their unique architecture, often featuring intricate mosaics, frescoes, and water systems to support life in arid environments. Many desert castles, such as Qasr Amra and Qasr al-Hallabat, showcase the artistic and cultural achievements of the Umayyad dynasty. These sites reflect the blend of Roman, Persian, and local influences, highlighting the region's rich history and the importance of trade routes during that era.