Jordan's desert castles, beautiful examples of both early Islamic art and architecture, stand testament to a fascinating era in the country's rich history. Their fine mosaics, frescoes, stone and stucco carvings and illustrations, inspired by the best in Persian and Graeco-Roman traditions, tell countless stories of the life as it was during the 8th century. Called castles because of their imposing stature, the desert complexes actually served various purposes as caravan stations, agriculture and trade centres, resort pavilions and outposts that helped distant rulers forge ties with local Bedouins. Several of these preserved compounds, all of which are clustered to the east and south of Amman, can be visited on one - or two-day loops from the city.