Arlington is a county in Virginia that is located just across the Potomac River from Washington, D.C. It is known for its diverse neighborhoods, rich history, and vibrant cultural scene. The county is home to a number of important landmarks and institutions, including the Pentagon, Arlington National Cemetery, and the Iwo Jima Memorial. Arlington is also home to a number of universities and colleges, including Marymount University. In addition to its many cultural attractions, Arlington is also known for its extensive parks system, which includes over 700 acres of parkland, as well as miles of bike trails and pedestrian paths. The county is easily accessible by car, with multiple major roads and highways running through the area, and it is also served by multiple public transportation options, including the Metro rail system.