Halil-ur Rahman Camii, with Callihroe Spring (ancient Spring of Rohas) - Pool of Abraham - Bal?kl?göl - in foreground. men in foreground. Pool filled with sacred carp; according to legend, when Abraham was hurled from battlements by Nemrut into fire below, God commanded that the fire turn to water and the firewood to carp. "The Pool itself with its mosque and cypress trees is one of the loveliest places I have seen in Turkey. I spent a long time there under the pretence of feeding the fish but really because after weary days of desert it was impossible to drag oneself away from the beauty of the clear water and trees and graceful towers."