What is the X in X-mas?
U.S. national burial ground in Arlington county, Virginia, on the Potomac River directly opposite Washington, D.C. Located on the antebellum plantation of George Washington Parke Custis, the adopted son of George Washington, the first president of the United States, the cemetery currently occupies 612 acres (248 hectares). Its central feature is Arlington House, a mansion that was constructed in 1802 in a Classical Revival style and modeled after the Theseum in Athens, Greece. The house, which is situated along the prominent ridges overlooking Washington, is operated by the National Park Service and serves as a memorial to Robert E. Lee