This east-looking, low-oblique photograph features the Arkansas River as it meanders generally southeastward from Arkansas City, Kansas, (left center) through Kaw Lake, past Ponca City and Sooner Lake, toward Tulsa (upper right). Ponca City, founded in 1893 after the opening of the Oklahoma Territory in 1889, is a trade, processing, and shipping hub in a grain, livestock, and oil area. Other manufactures include clothing, oil drilling equipment, and food processing products. Visible are the extreme southern portions of the gently rolling, grass-covered Flint Hills (upper left).