Kennedy Space Centre will stop doing tours of the famous Vehicle Assembly Building in February.
Until then, the 'Up Close' tour stopped at the VAB and actually let guests see inside (from my own experience, it's an awesome experience - it really is cavernous). It was always temporary, but I'm still gutted... At least until I've got a new spectacle to see - maybe like them going back to the Moon? Or Mars?
More details here: