Wired:

Deep inside the mountain, a crew of humans toils in one of the nation’s most secure military installations. Shielded by 2,500 feet of granite, these people gather and analyze data from a global surveillance system, in an attempt to (among other, undisclosed things) warn the government’s highest officials of launches and missile threats to North America.

Their military mole-city, completed in the mid-1960s amid Cold War worries, is—when fully buttoned-up—highly resistant to nuclear bombs, electromagnetic bombs, electromagnetically destructive behavior from the sun, and biological weapons. It’s designed to do its job, and let those inside do theirs, in the worst of worst-case scenarios.

This place has always fascinated and terrified me in equal measure.