The Saturn V Rocket, which was used to take the first men to land on the moon was huge and as
tall as a 35-storey building. The rocket itself was built inside an assembly building so big that it could hold several of these huge rockets in an upright position! This big building, called the Vertical Assembly Building, or the VAB , in Florida, covers ten acres about nine football fields and is as high as a 50 story building.
When the rockets were completed, they were moved out of this building, through doors that were 460 feet high the largest doors ever built.