Located in the heart of the fertile Adana region, Adana has been an important city for many civilizations for centuries dating back to the Hittites. Here, you can visit the Stone Bridge, built in part during the 6th-century reign of the Byzantine emperor Justinian I, the oldest extant bridge in the world which is still in use; Yilanli Kale - the ruins of a castle dating from 782. Other fascinating sites include: the 16th century Great Mosque (Ulu Camii), the Yag or Eski Mosque, the Hasan Aga Mosque, Saat Kulesi (the clock-tower) built in 1882, an old covered bazaar, Bedesten or Arasta. The Ethnographical Museum housing Turkish carpets, swords, manuscript books and tombstones, is also well worth a visit as well as the Adana Archaeological Museum. Adana is also famous for its delicious Adana Kebap and other meat dishes.