Sinister sculptures and secret bunkers. Swastika-shaped runways and murals that point to a New World Order takeover or alien invasion.

And what about those gargoyles hanging out by the baggage claim?

Conspiracy theories about Denver International Airport have soared for more than two decades, owing to the airport’s mix of bold public art, unusual architecture, infamous construction problems and an internet-fueled cycle of self-feeding paranoia.

They predate even the airport’s 1995 debut, but Jesse Ventura helped popularize them with a 2012 episode of his TV show “Conspiracy Theory,” and dozens of media outlets from ABC News to the Science Channel continue to report them on an annual basis.

Not that the airport discourages the speculation.