The Düden Waterfalls are two waterfalls of the Düden River in the province of Antalya, Turkey. At the Upper Düden Waterfall, the water of the Düden River reappears from a karstic source after having disappeared 18 kilometres away at Bıyıklı Sinkhole. Water coming through a canal from Kepez 1 Hydroelectric Power Plant forms the waterfall, which drops i…The Düden Waterfalls are two waterfalls of the Düden River in the province of Antalya, Turkey. At the Upper Düden Waterfall, the water of the Düden River reappears from a karstic source after having disappeared 18 kilometres away at Bıyıklı Sinkhole. Water coming through a canal from Kepez 1 Hydroelectric Power Plant forms the waterfall, which drops into the basin of the source.