Washington, D.C.'s Top 10 : Arlington National Cemetery - Tomb of the Unknowns This solemn monument is guarded 24 hours a day by The Old Guard. Unknown soldiers of World Wars I and II and the Korean War are entombed here. A Vietnam soldier was interred here, but he was later identified.
The Tomb of the Unknowns at Arlington Cemetery is a monument dedicated to American service members who have died without their remains being identified. It is watched at all times by tomb guards, soldiers of the United States Army's 3rd Infantry Regiment.