address. Dulles Town Center is a census-designated place located within Dulles, which contains the Dulles Town Center shopping mall. Lowes Island is an advertised portion of the legal subdivision of Cascades, but is not a legal subdivision itself. While newer residents use the city address "Potomac Falls, VA", the post office will recognize either "Potomac Falls, VA" or "Sterling, VA" as a correct mailing address. Almost 50% of the Lowes Island geography is occupied by club grounds and a golf course. Potomac Falls is another name for the unincorporated area along the Potomac River in the northernmost portion of Sterling with the ZIP code of 20165, bordering Maryland. It contains the census-designated places of Countryside, Cascades, and Lowes Island. The name for Potomac Falls came from a competition to name the second new post office in Sterling. Alternately called Potomac Falls or Sterling, the village consists of the communities of Glen Heather, Calvert's Glen, Cascades, Countryside, Lowes Island, Rivercrest, Potomac Hunt, Great Falls Forest and Great Falls Chase. Development of Potomac Falls began in the late 1980s, and is essentially complete today. Potomac Falls borders Great Falls and Fairfax County to the southeast and has several shopping areas, schools, and community centers. Potomac Falls is also home to three 18-hole golf courses including Trump National Golf Club and is home to the Potomac Falls High School Panthers. Sterling Park is a portion of Sterling with the ZIP code of 20164. The land where Sterling Park was built was mainly made up of a few very large farms. When construction of Dulles International Airport began in 1959, land prices began to rise. In 1961, Marvin T. Broyhill Sr. saw this as a great investment opportunity and decided to buy the that now make up Sterling Park . Construction of homes priced $14,800 to $22,500 was completed by 1967. Sterling Park was one of the first planned communities built in eastern Loudoun County and was a popular place for government workers to settle with their families outside Washington, D.C. Sterling Park also contains a variety of businesses, churches, parks, a community center, a semi-private golf club with schools, tennis courts, and two swimming pools. It is the home of the Park View High School Patriots. Sugarland Run is a portion of Sterling with the ZIP code of 20164. Built in the 1970s in the style of Sterling Park, its shopping center consists