Altınbeşik - Düdensuyu Cave Altınbeşik Cave, also known as Düdensuyu Cave, is located on the western slope of the deep and steep Manavgat Valley, situated east of the Ürünlü Village in İbradı district. With a total length of 2,500 meters, the highest point of the cave is 101 meters compared to the entrance. It is partially active, and ponds are generally formed under dry seasons due to the lower and middle levels of the cave being active. Stalactites also break off during these times. The upper level remains dry throughout. The cave has a humid atmosphere with temperatures ranging from 16-18 degrees Celsius. The carstic topography, combined with a dense pine forest, creates a unique landscape. The water inside the cave is connected to Beyşehir Lake (Beyşehir Gölü), and due to the higher water level, boats are used for traveling.