The Hayk Sarzain (Ta. “Swollen-waters in the Earth-sands”) was the great lake of Isra in the river Maudar.The city of Tûl Isra lay on it's east bank, where also the Kek Dónemek started, on the northeast bank lay the village of Murnett .The Kek Tepe (Ta. “Hiil Walk”) departed from the Yó Isra at it's central narrows.