Hot Air Ballooning ... Indoors?

Indoor hot-air ballooning was once a feature of the annual airshow at the Moffat Naval Air Station in Mountain View, CA. This shot was from the final Moffat airshow prior to the base being closed. It is hard to comprehend how large this blimp hangar really is until you put a huge object inside of it, and realize that the huge object is dwarfed by the building. The balloons themselves were tethered to the ground. You could purchase rides, with the money going to charity.