It is of octagonal design and comprises three floors crowned by a rather flat dome, totally empty inside. It appears to predate the 2nd millennium AD and may have been a Zoroastrian building, and is remarkable because of being constructed of stone rather than the more usual brick. The door is permanently locked, although the tourist office might be able to find someone to open it for you if you really want to see inside. To get there, take a shared taxi from Shohada Square. The rocky outcrops over looking the Martyrs Cemetery just south-east of the Gonbad-e Jabalieh, offer a fine outlook over Kerman, if only you manager to climb to the top. It has been repaired during the first decades of the advent of Islam in Iran.