It formed the southwestern administrative division of Pars, and consisted of a mountainous countryside of the southern Zagros Mountains—much of the territory inhabited later by the Qashqai tribe; with its mountainous terrain and extreme temperature, this was regarded by the geographers as a sardsīr (cold zone). The Zagros mountains and the coastal plain, along the Persian Gulf, however, was regarded by the geographers as a garmsīr (hot zone). In the center of the circular city of Gor, there was a tower-like structure called Terbal, which was similar to a Buddhist stupa. Furthermore, there was also a fire-temple which the 10th-century Arab historian al-Masudi reportedly visited.