Take Metro to the Arlington National Cemetery stop which puts you within steps of the Welcome Center. From there, grab a map or use the Arlington National Cemetery app to locate specific gravesites or simply follow the signs to memorials such as Arlington House, the JFK gravesite and the Tomb of the Unknown Soldier. You can purchase a narrated tour of the cemetery via trolley on Arlington National Cemetery Tours, which makes navigating the hilly terrain easier. Most people spent two or three hours visiting Arlington National Cemetery and watching the Changing of the Guard.