Arlington is best known to visitors as the home of the Pentagon and Arlington National Cemetery and boasts high quality residential neighborhoods. Arlington has over 50 civic associations, dozens of citizen boards and commissions, and over 100 community service organizations. There are almost 200 public parks and playgrounds, 86 miles of biking/jogging trails, 14 community centers, 5 theaters and 8 libraries in Arlington for residents and visitors to enjoy. Arlington's central location in the Washington DC metropolitan area, its ease of access by car and public transportation, and its highly skilled labor force have attracted an increasingly varied residential and commercial mix.