It is located between Afyonkarahisar and Denizli. Although its surface area is actually 160 square kilometers, it decreases to 40 square kilometers when the water is withdrawn. Approximately half of it is within the borders of Dazkırı and Başmakçı districts. The waters of Bitter Lake are very salty and have no outflow. Sodium sulfate content in lake water is also very high. For this reason, exports are made. The lake, which has a depth of 3-4 meters in rainy periods, dries almost completely in summer. In some parts it turns into swampy areas. It is around 900 meters above sea level.