The striking greenish color of the lake attracted the very first treasure hunters and hunters of the chamois, who could not explain what caused this unusual color of water. They were thinking of romantic fables about the gem that collapsed from the walls of the Jastrab Tower. This fairytale was easily accepted by the first tourists and explorers who appeared on the banks of the lake. Explanation was found later. The water has a greenish color from the springs that spring from the bottom of the lake.