Beat this. Sydney offers "Tarmac Tours". You get into a mini bus and drive ALL around the airport proper. Over the runways. Next to landing panes (man - the DUST!) the VIP section, the maintennce hangars, the weather stations, etc.
About $A25 (=US 4 cents lately!) and seems it is the ONLY major airport in the world that allows this to the public. Too much security risk most of them cite. They LOCK the van before you depart after security! There is a flashing light on top like a police car at all times.
A REAL experience if anyone has a few spare hours at SYD!
For more info see:
http://www.smh.com.au/travel/9904/10/travel6.html