Chattanooga is located in southeastern Tennessee, on the Tennessee River, near the Georgia border. Bridges span the river to link the two sections of the city, which is a services, financial, retail, and distribution center. Manufactures include textiles, primary and fabricated metal, chemicals, and food products; tourism is of growing importance to the economy. The city, almost surrounded by mountains, is the center of an area with many scenic attractions, including Rock City Gardens, an area of natural rock formations with views of seven states; Ruby Falls, a natural waterfall far below the surface of Lookout Mountain and accessible through cavern passages; and Raccoon Mountain Caverns. A 2005 real estate survey has estimated the population of Chattanooga, Tennessee at 155,554.