Tulsa is located along the Arkansas River, at the foothills of the Ozark Mountains in northeast Oklahoma. A region of the state known as “Green Country," the city has been called one of America’s "Most Livable Large Cities" by Partners for Livable Communities, Forbes, and Relocate America. Tulsa was likewise ranked among the top 50 best cities in the United States by BusinessWeek. With 135 parks that are spread over 6,000 acres, Tulsa is made more exciting for any outdoorsman to feel at home. For connoisseurs of the arts, Tulsa has several permanent dances, theater, and concert groups such as the Tulsa Ballet, Tulsa Opera, and Tulsa Symphony Orchestra. Other points of interest include the Tulsa Zoo, the Oklahoma Aquarium, and the Tulsa Convention Center.