Sar-e Pol-e Zahab T AQ-E GARA: In the district of Sar-e Pol- e Zahab, in the heights known as the Gate of Zagros, there is a gorge called Pa Taq. Adjoining the Pa Taq path, there can be seen a simple stone structure, somewhat like a grotto, which is known as Taq-e Gara. At the entrance of this structure, there is a cradle-shaped arch cut as a corridor into the mountain and consisting of large rectangular blocks of stone. Inside the grotto and the arcade there are some graceful remains of the Ashkanian (Arsacid) and Sassanian structures. According to some archaeologists the structure was intended to be used for occasional royal stop-overs, while others consider it as landmark on the border line.