Sultan Sisli National Park is located around Yei Lake between the districts of Yeşilhisar, Develi and Yehyalı in Kayseri Province. It covers an area of 24,357 hectares at an altitude of 1,000 meters above sea level. It was declared a national park in 2006, but it was exposed to drought in 2009, but it became a haven For migratory birds again after the water levels returned to normal after using the modern irrigation system, and today it hosts about 250 species of birds and 30 flamingos.