ming ▁Category : Random ▁text ▁generation <0x0A> </s> ▁Boy ab at ▁Castle , ▁is ▁a ▁castle ▁in ▁the ▁town ▁of ▁Boy ab at , ▁Sin op ▁Province , ▁Turkey ▁built ▁by ▁the ▁Pap h lag oni ans ▁in ▁anti qu ity ▁and ▁re construct ed ▁under ▁Roman , ▁By z antine , ▁and ▁Ott oman ▁rule . ▁The ▁castle ▁functions ▁as ▁a ▁museum ▁today . ▁ ▁Kaz d ere / G az id ere , ▁a ▁trib ut ary ▁of ▁G ök irm ak , ▁cut s ▁the ▁rock ▁that ▁the ▁Boy ab at ▁Castle ▁is ▁per ched ▁on ▁with ▁a ▁dram atic ▁pair ▁of ▁vertical ▁walls . ▁The ▁wall ▁on ▁the ▁castle ▁side ▁has ▁a ▁window ▁on ▁the ▁rock ▁face ▁ill umin ating ▁desc ending ▁t unn els ▁to ▁a ▁newly ▁discovered ▁large ▁under ground ▁city ▁from ▁Roman ▁times . ▁The ▁t unn els ▁may ▁also ▁have ▁served ▁for ▁water ▁supply ▁and ▁safe ▁passage ▁during ▁sie ge . ▁ ▁The ▁castle , ▁which ▁probably ▁has ▁not ▁been ▁in ▁serious ▁use ▁since ▁around ▁ 1 3 0 0 ▁A . D . ▁but ▁may ▁be ▁as ▁old ▁as ▁ 2 8 0 0 ▁years , ▁over look s ▁the ▁G ök ı rm ak ▁valley . ▁This ▁valley ▁is ▁long ▁and ▁lies ▁parallel ▁with ▁the ▁Black ▁Sea ▁coast . ▁T ogether ▁with ▁the ▁similarly ▁placed ▁Ye ş il ı rm ak ▁( river ) ▁valley ▁further ▁east , ▁it ▁forms ▁a ▁natural ▁east - west ▁path way ▁used ▁since ▁the ▁anti qu ity