broadcast markets, they will often locate their broadcasting antennas very near each other, and in some cases, will even share land or towers with each other, in the interests of space, land availability, and the cost of putting a transmission building on top of a mountain. In the United States Most metropolitan areas have at least one antenna farm, such as Mount Wilson in greater Los Angeles (seen at right), Sweat Mountain in metro Atlanta, Farnsworth Peak for the Salt Lake Valley, Riverview in Tampa, Florida, Baltimore's Television Hill and Slide Mountain (Mount Rose ski area) in the Reno/Tahoe area. Some cities instead have combined many stations onto one tower, often through diplexers into just one or two antennas, such as atop the Empire State Building in New York, the landmark Sutro Tower of San Francisco, or the huge Miami Gardens tower serving the Miami and Fort Lauderdale region. Cleveland, Ohio has its antenna farm in the suburb of Parma, Ohio due to Parma's high elevation. In central Oklahoma City most of the city's media outlets transmitter and tower facilities are located between the Kilpatrick Turnpike to the south and Interstate 44 to the north, Broadway Extension to the west and Interstate 35 to the east with Britton Road being the central thoroughfare. In addition, all three network affiliates and one of the 3 major radio groups have their studio facilities located within the Oklahoma City tower farm. In the Appalachian Mountains of the Eastern United States, Poor Mountain serves most of the FM and TV stations in the Roanoke/Lynchburg market. Holston Mountain in upper East Tennessee is home to most of the FM and TV stations in the Tri-Cities (Bristol, Virginia-Kingsport, Tennessee-Johnson City, Tennessee) DMA. Other examples are Signal Mountain near Chattanooga, Tennessee, Sharp's Ridge in Knoxville, Tennessee, and Paris Mountain in Greenville, South Carolina. Other examples of co-located towers on mountain peaks in the United States are on Red Mountain in Birmingham, Alabama; Mount Wilson near Los Angeles; the Sutro Tower in Clarendon Heights near Mount Sutro in San Francisco; Lookout Mountain, Colorado near Denver; Cedar Hill between Dallas and Fort Worth; South Mountain Park near Phoenix; Nelson Peak near Salt Lake City; Sandia Crest near Albuquerque, New Mexico. Probably the most famous broadcast antenna farm of all is the World Trade Center Tower One, on which many of the New York City television and several FM stations