The Karanlık canyon starts on the Euphrates River, on the Karasu (longest) river, and almost 2 kilometers north of Kemaliye. While the canyon was deeper and Karasu was drifting through the Sandık Dağı and Erek Dağı which it had crushed in millions of years, the waters increased more than 80 meters with the construction of Keban Dam in the 1970s, and Kanyon gained a magnificent view. The canyon walls are very steep and high in places, this height exceeds 600 meters in some places. Although Karasu passes through many narrow and rough canyons during his long journey, he is 8.2 kilometers long between the entrance of the Dark Canyon entrance and its most spectacular and beautiful, which is the most impressive and beautiful. The canyon gives life to Kemaliye with its extraordinary tourism potential. In terms of sportive and tourism activities from May to October are the best times.