Arlington National Cemetery

Covering an area of 2.6 square kilometers, Arlington National Cemetery was originally the estate of Confederate General Lee. Today, the highest point of the park still has General Lee's former residence, overlooking the Washington Monument and the Lincoln Memorial. The most well-known is the Tomb of the Unknown Soldier, guarded by sentinels, and the precise changing of the guard ceremony is very popular. There are also the graves of President Kennedy and the Challenger disaster victims.