Altınbeşik - Düdensuyu Cave The Altınbeşik Cave is on the western slope of the deep and steep Manavgat Valley, situated east of the Ürünlü Village in İbradı district. The highest point of the cave, which has a total length of 2,500 meters, is 101 meters compared to the entrance. The cave is horizontal and partially active; since the lower and middle levels of the cave are active from time to time ponds are generally formed under dry seasons (this also includes stalactites breaking off). The upper level remains dry all the time. The air inside the cave is humid and its temperature ranges from 16-18 degrees. The carstic topography, combined with a dense pine forest, creates a unique landscape. The water inside the cave relates to Beyşehir Lake (Beyşehir Gölü). Since the water level is higher than average, boats are used when traveling.