Dallas ( /ˈdæləs/) is the third-largest city in Texas and the ninth-largest in the United States. The Dallas-Fort Worth Metroplex is the largest metropolitan area in the South and fourth-largest metropolitan area in the United States. The city's prominence arose from its historical importance as a center for the oil and cotton industries, and its position along numerous railroad lines. Dallas developed a strong industrial and financial sector, and a major inland port, due largely to the presence of Dallas/Fort Worth International Airport, one of the largest and busiest airports in the world. Dallas is known for its barbecue, authentic Mexican, and Tex-Mex cuisine. Famous products of the Dallas culinary scene. The Arts District in the northern section of Downtown is home to several arts venues, notable venues in the district include the Dallas Museum of Art, the Morton H. Meyerson Symphony Center (home of the Dallas Symphony Orchestra), The Trammell & Margaret Crow Collection of Asian Art, the Nasher Sculpture Center, The Dallas Contemporary, and The Dallas Children's Theater. The most notable event held in Dallas is the State Fair of Texas, which has been held annually at Fair Park since 1886. The fair is a massive event, bringing in an estimated $350 million to the city's economy annually. The Red River Shootout, which pits the University of Texas at Austin against The University of Oklahoma at the Cotton Bowl also brings significant crowds to the city. Nearby Arlington, Texas is the new home to the Dallas Cowboys of the National Football League. Since joining the league as an expansion team in 1960, the Cowboys have enjoyed substantial success, advancing to eight Super Bowls and winning five; according to profootballreference.com. The City of Dallas maintains and operates 406 parks on 21,000 acres of parkland. Its flagship park is the 260-acre Fair Park, which hosted the Texas Centennial Exposition in 1936. The city is also home to Texas' first and largest zoo, the 95 acres Dallas Zoo, which opened at its current location in 1888. To the west of Dallas in Arlington is Six Flags Over Texas, the original franchise in the Six Flags theme park chain. Hurricane Harbor, a large water park owned by Six Flags, is also in Arlington.