City: Salt Lake City

One of the most imposing structures on United States soil— no disrespect, one should admit that it's pretty awesome looking—the Mormon Temple in Utah should definitely set off some red flags, even in the minds of non-Illuminati-types. You know, those who can think freely and independently of organizations set on unleashing world domination. Look at it. With its tall steeples, Gothic-inspired facade, and generally ominous lighting, there's no denying its appeal to bloodthirsty mastermind-types. If the Illuminati meets here, let us be the first to say, we should have known all along. Symbols on the church's exterior like the all-seeing-eye, depicted as an eye peeking from the clouds, make us all the more suspicious.