The Tomb of the Unknowns with guards

The Tomb of the Unknown Soldier stands on top of a hill overlooking Washington, D.C. One of the more well-attended sites at the cemetery, the tomb is made from Yule marble quarried in Colorado. It consists of seven pieces, with a total weight of 79 short tons (72 metric tons). The tomb was completed and opened to the public April 9, 1932, at a cost of $48,000.

It was initially named the "Tomb of the Unknown Soldier." Other unknown servicemen were later entombed there, and it became known as the "Tomb of the Unknowns", though it has never been officially named.