Lake Eber is a freshwater lake in Afyon Province, Turkey. The lake used to be connected with nearby Lake Akşehir and was named Tessarakonta Martyron, the Forty Martyr's lake, in premodern times.
Wikipedia https://en.wikipedia.org/wiki/Lake_Eber
Address 03300, Turkey
Coordinates 38°38'46.563" N 31°9'37.426" E