SA-503, the Saturn V used for Apollo 8, is assembled in the VAB in late 1967. This Saturn V was originally intended for another unmanned mission, following the engine failures of Apollo 6, but rapid testing and improvements allowed for a safe flight for the crew of Apollo 8.
The sheer scale of this image is astounding.

SA-503, the Saturn V used for Apollo 8, is assembled in the VAB in late 1967. This Saturn V was originally intended for another unmanned mission, following the engine failures of Apollo 6, but rapid testing and improvements allowed for a safe flight for the crew of Apollo 8.

The sheer scale of this image is astounding.