Hidden underground rooms

these stairs

Steven M. Johnson's "Patent Depending" series of inventions range from social commentary to plain ol' bizarre, and they always give us a laugh. So we've contracted him to let us publish one every week.

Building an underground bunker easy way in your current basement. Doomsday bunker floor plans. Underground bunker design. Bomb shelter DIY.

Lock up your valuables or hide yourself from annoying house guests with any of these hidden rooms and secret passageways.

3259 views on Imgur: The magic of the Internet

These budget fall-out shelters are now an option for all new custom homes and affordable for most people starting at just $20,000. Aside from nuclear threats and terrorist attacks, the increase of natural disasters is becoming the new normal and these amazing designs will add peace of mind.

Replacement characters might come from a traditional bunker

Atlas Survival Shelters produce a wide range of survival shelters, underground bunkers & NBC air filtration systems under your home. We designs and manufacture over 20 styles of protective shelters to protect you in the event of civil outbreak, bomb & nuclear fallout.

Hidden doorway in hillside to outdoor room or bunker, hidden passage into house, or root cellar. Maybe Bat-Cave?

Truth is stranger than fiction, or so the saying goes. And if you think massive, underground cities is something confined to fantasy and science fiction, here are several, real locations that humans have made their homes deep beneath the ground over the years.