Most governments have their fair share of vaults and covert bunkers, but there are a whole slew of other, privately-owned, depositories that are as equally protected as any military base. While we’re sure those in the doomsday or “prepper” crowd have some pretty impressive bunkers of their own, here are some of the most highly guarded vaults we actually know about.

10. Mormon Vault

The Mormon Vault, a.k.a the Granite Mountain Records Vault, is owned by the Church of Jesus Christ of Latter Day Saints and is built 600-feet into the side of a giant rock in Little Cottonwood Canyon, Utah. Although surrounded by rock (technically quartz—not granite), don’t think you can go dynamiting your way in there as it was constructed to withstand a nuclear blast and has steel, bank-safe type doors designed to seal tighter under impact. There are some administrative offices inside the complex, but it is not open to the public or even church members.

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