16. RAF Menwith Hill Base, Great Britain
The RAF Menwith Hill Base is a British Royal Air Force station in England that provides a dizzying array of services including communications and intelligence support. It’s been described as the most prominent electronic monitoring station in the world and you can bet that it’s not easy to get into. Its servers are housed in bizarre-looking gigantic golf ball structures across the base and it has been known to conspire with the NSA. It’s bordered by fences, secured by a sophisticated alarm system and guarded at all hours of the day due to the goldmine of classified information that lies within.