http://www.arlingtoncemetery.mil/
Location: Memorial Drive and Hwy 110
Metro stops: Arlington Cemetery- Blue Line
Open daily all year. Hours are seasonal. October through March is from 8:00 am to 5:00 pm and April through September is from 8:00 am to 7:00 pm. View the Changing of the Guard at the Tomb of the Unknown Soldier every hour on the hour and every half hour during the summer months. See the Amphitheater, the Custis-Lee Mansion, and the graves of Presidents John F. Kennedy and William Howard Taft. Admission is $5.25 for adults, and $2.75 for children.