2. Denver Airport
Speaking of Denver, let’s delve into that a little deeper. There is a belief among some that a giant underground facility has been built beneath the airport in Denver, Colorado. Again, opinions differ, but the prevailing theory seems to be that it is a massive military facility. A few things may make one think about this one a little bit, especially the bizarre murals that adorn the walls inside the airport facility. They feature scenes that are suggestive of some Armageddon or apocalypse. Regardless of the stories about an underground facility, those are indeed some unique murals, and we’re hard-pressed to understand why they would be chosen for display there.