When Denver International Airport opened on Feb. 28, 1995, construction had fallen 16 months behind schedule, and $2 billion over budget. The final cost of the Denver airport was $4.8 billion, which is a lot of money. People wondered what it had gone toward. The airport itself is 35,000 acres, which is almost twice as large as the next biggest U.S. airport.

An aerial view of the runways at Denver International Airport shows that they resemble the shape of a swastika. This is not a typical formation for an airport’s runways. However, an airport representative has said that the runways are designed that way so that they can be used simultaneously no matter the weather condition, since none of the runways overlap. She told the U.K.’s The Telegraph, “We think the shape looks like a pinwheel.”

The airport was dedicated on March 19, 1994, and a capstone was placed inside the airport to memorialize it. This dedication stone displays the Masonic symbol of a compass with a capital G inside. Underneath the symbol, the “New World Airport Commission” is credited with helping fund and build the airport.

What is the “New World Airport Commission”? Airport officials have said that it was a commission for the new “world airport,’ but the wording calls to mind the New World Order conspiracy. New World Order conspiracists believe that there has been a small group of powerful people working together in secret throughout history toward establishing a single all-powerful global government.

The Masonic symbol ties into this conspiracy. Freemasonry is a very real secret fraternal society that’s allegedly the largest in the world and may have existed as far back as the Middle Ages. Since this secret society has had many powerful members throughout history, people have long been suspicious that the Freemasons were looking to seize power. Perhaps they are involved in trying to establish the New World Order?

Not helping things: Conspiracy theorists have pointed out that if you add up the numbers in the airport’s dedication date, you get 33, which is reportedly the highest level of Freemasonry. More helpful: This only works if you leave out “March,” making it kind of a stretch.

Many of the conspiracies around the Denver airport revolve around what may lie beneath the airport. A former airport construction worker claimed that the reason why the airport was so far behind schedule was because five multistory buildings were built underneath the airport. This same construction worker, as well as others, also supposedly said that there was a complex network of tunnels beneath the airport.

These claims led people to theorize that there may be anything from a vast network of underground New World Order command bunkers, to post-apocalyptic fallout shelters for the global elite (such as billionaires and politicians), to a future FEMA concentration camp waiting to be used beneath Denver International Airport.

It was later determined that the “underground tunnels” had actually become home to the airport’s rail system.

One of the most startling things in the Denver airport are the murals that line the walls on Level 5 of the Jeppesen Terminal. Many think that the murals, painted by artist Leo Tanguma, tell the story of apocalyptic biowarfare destroying the world as we know it, with the New World Order taking over in its place.

The art was chosen through a project selection panel made up of community members and artists, and was approved by several government committees and the then-mayor of Denver before being installed in the airport. Even if this art has nothing to do with the New World Order, it seems surprising that so many government officials reviewed this art and didn’t think people would be suspicious of it.

Just some super-chill airport artwork.

Something truly creepy is the blue horse statue outside the airport itself. Titled Mustang, but nicknamed “Blucifer” by conspiracy theorists, this statue is 32 feet tall and 9,000 pounds. Its eyes glow red at all hours of the day and night, causing some to speculate that the statue is meant to represent the Fourth Horseman of the Apocalypse from the biblical book of Revelations. The Fourth Horseman specifically represents Death.

The creepiest part is that the statue’s artist, Luis Jiménez, was actually killed by the statue. In 2006, before the statue had been completed, a piece of the statue fell on him and severed an artery in his leg.