Secret passageways, trap doors and hidden rooms were standard in some of your favorite mystery series – like "Scooby-Doo" or Nancy Drew. You probably saw them coming. But in real-life, you'd never ...

This build creates a redstone-powered secret door that hides perfectly within walls. It is compact, secure, and easy to build ...

Under the floorboards of the U.S. Capitol lie hidden staircases and passageways left over from the iconic building's original construction in the 18th century, a viral video posted by Republican North ...