Insuyu Cave Insuyu Cave is a horizontal cave, with a total length of 597 meters. It is located 13 kilometers from Burdur to Antalya. Insuyu cave is about 1200 meters above sea level. Geographically, the cave is located on the northeast sides of Western Taurus and it consists of limestone geology. It is estimated that the cave was formed thousands of years ago by limestone deposits. There are 9 large and small lakes found within the caverns, which open in various directions and seem to have a constant stream of cool, clean air flowing through them.The melting of limestone and the erosion inside the cave caused the formation of stalactites and stalagmites. It is believed that the water inside the cave is curative for diabetes and stomach diseases, especially when mixed with medicinal herbs.