1. Arlington National Cemetery is a military cemetery located in Arlington, Virginia just across the Potomac River from Washington, DC. It was established in 1864 during the Civil War as a final resting place for Union soldiers. Over the years, it has expanded to include the graves of soldiers from every major conflict in American history, including the American Revolution, World War I and II, the Korean War, and the Vietnam War. There are over 400,000 graves in total.

Some interesting sites to visit within the cemetery include the Tomb of the Unknown Soldier, the Eternal Flame at John F. Kennedy’s grave, and the Memorial Amphitheater, which hosts the annual Memorial Day and Veterans Day ceremonies. The cemetery is also home to the Arlington House, which was the former home of Robert E. Lee and is now a museum.

2. The cemetery is open every day except for Christmas Day. Between April and September, the cemetery is open from 8:00 AM to 7:00 PM, and from October to March it is open from 8:00 AM to 5:00 PM. Their phone number is 877-907-8585.

3. Admission to the cemetery is free, but tickets are required for the Changing of the Guard ceremony at the Tomb of the Unknown Soldier. These tickets are available at the Welcome Center on a first-come, first-served basis. Visitors can take a Metrobus or Metrorail to the cemetery, or park in one of the onsite parking lots.