hidden city underneath denver airport?

http://www.alienhub.com/showthread.php?t=392

read on a website that some people believe that there is an underground city underneath DIA. here's the text:

Believed by many conspiracy theorists to be the Western headquarters of the New World Orderand a massive underground base and city is believed to exist underneath the airport. Reasons for this include: the airport is unusually large (larger than some major cities), is somewhat distant from the Denver city centerthere were in the airport a set of bizarre murals (some of which have been painted over) depicting burning cities, gas-mask wearing soldiers, girls in coffins, Masonic symbols, and starnge writings.

The DIA is odd, first outside the building, they have the strange masonic-like keypad, then inside, they have the murals of dead babies, gas-mask soldiers, city's burning. Note, on the keypad, the words are imprinted on the bottom "Airport of the New World Order". The murals have such a strange meaning to them all, the sneaky bas***ds around the airport change the paintings to sometimes make them look better, a few have been changed behind our backs, but only the colors were changed..maybe to lighten up our moods, who the hell knows, but anyway, why the hell are they there.

Also, had to insert this, someone supposedly found a tunnel under the airport revealing a long hall with shower heads lined up on both sides on the ceiling..