A Michigan mansion on sale for $6 million has a luxury 'prepper' bunker with a hidden entrance and soundproof gun range — check it out.

A Michigan mansion on sale for $6 million has a luxury 'prepper' bunker with a hidden entrance and soundproof gun range — check it out.

A mansion in Battle Creek, Michigan, with an arrow pointing to one of the revealed entrances to the bunker.Mary Noneman <ul> <li>A Michigan mansion that cost more than $10 million to build is now on… [+8696 chars]

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