Arlington is a prominent urban county located in Northern Virginia, directly across the Potomac River from Washington, D.C. It is often considered a suburb of the nation's capital but functions as a major employment center in its own right, home to the Pentagon, Ronald Reagan Washington National Airport, and numerous federal agencies and corporate headquarters, including Amazon's HQ2. Arlington is characterized by its dense, walkable urban villages, excellent public transportation (including a robust Metro system), and a high quality of life. The county boasts a diverse population, strong job market, and highly-rated public schools. Its close proximity to D.C. offers residents unparalleled access to cultural attractions, historical sites, and government resources. Despite its urban feel, Arlington also maintains a significant amount of green space, parks, and recreational facilities.