The belief is that "Denver International was designed and built by the Illuminati as the headquarters for the global genocide that will trigger the New World Order" (Skeptoid).
A look at the theories and conspiracies:
1. The initial cost of DIA was predicted to be $1.7 billion, however, it ended up costing $4.8 billion.
2. Granite tile was imported from all over the world - Asia, Africa, Europe, North and South America - and was used in making the main terminal floor.
3. The construction began with five buildings that were supposedly built wrong. Instead of demolishing the buildings like they would normally do, they were buried intact. It's said that up to eight levels of underground facilities are expected to exist, and when questioned, they are said to be for storage. Different companies were hired to build different parts underground. Shortly after, they were all fired which implies that no one truly knows what the underground looks like.
4. People claim the barbed wire surrounding Denver International Airport points in rather than pointing out.
5. From an aerial view, DIA looks like a Nazi swastika.
6. In 2007, fourteen commercial aircrafts were reported to have spontaneously shattered windshields as the presumed result of electromagnetic pulses.
7. The artwork is a series of four painted drawings that reveal the Illuminati's plans for global genocide and a New World Order. The artwork was painted over many times due to the mass amount of controversy.
8. In front of the large mural, there lies a floor engraving of "Au Ag." Some argue it means "silver" and "gold," but some say it stands for "Australia Antigen."
9. The Queen has secretly bought land on the property of DIA, and supposedly other "Illuminati" members have as well.
10. "The New World Airport Commission" was mentioned on a capstone in the airport, but many say this dedication doesn't exist and is merely an indication to the future.
11. They moved 110 million cubic yards of earth around which is more than when they dug out the Panama Canal.
Now, time to find out if any of this is even true.
"The Denver Airport Conspiracy." Skeptoid: Critical Analysis Podcast. Web. 07 Mar. 2012. <http://skeptoid.com/episodes/4194>.
"Denver Airport Underground Base and Weird Murals." Anomalies Unlimited. Web. 07 Mar. 2012. <http://www.anomalies-unlimited.com/Denver_Airport.html>.