Blue Lake; It is 200 m from the junction of Göksu Stream and Aksu Stream, within the borders of the Dereli district of Giresun, Alancık village, Kuzalan Mahallesi and Pınarlar village. It is at a distance of 26 km from the town of Dereli. 57 km from Giresun province. is at a distance. The lake was formed by the natural closure of the Göksu Stream, which is soda water.