I took this one this summer, looking upward inside the Vehicle Assembly Building at the Kennedy Space Center. The VAB was for a long time the world's largest building in terms of volume: 3,664,883 cubic meters (129,428,000 cubic feet). So an enormous space inside a building designed to put together the vehicles that take people into space.
Side note for any fellow space geeks here (Bojojoti, I'm looking at you! *g*): The VAB was closed to tours for the duration of the shuttle program, but is open again to the public for a limited time. I'm very glad we had a chance to see the inside while we could; the last time I was in that building was sometime around 1978, if I recall correctly. The nose cone you see in this photo is a mock-up of the cone/capsule that will top the new SLS rocket, which will be bigger than the Saturn 5 rocket that propelled the Apollo missions to the Moon. They're busy configuring the VAB for that program, and once it gets fully underway (I think the first test launch is planned for 2017), the VAB will once more be off-limits to us mere mortals. So if you have a chance, I highly recommend taking one or more of the Kennedy Space Center's "Up Close" tours. You really do get to see things up close... like Launch Pad 39A, where you can stand in the pit where all the flames, steam and smoke come boiling out from beneath the rockets.