"Not every architectural quirk hides a mystery,” an expert told Newsweek, but some details may indicate hidden spaces.

The Colosseum is a historical site atop many history buff's bucket lists, and a visit just got all the more enticing. For the ...

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 ...

I gotta be honest: I just watched National Treasure, which led me to Google if there was actually a hidden room in Mount Rushmore, and I was pretty surprised when there was! So here are 17 famous ...

The idea of having a secret storage space or a hidden feature nobody knows about is very attractive for a lot of people. The idea of a secret room behind the bookcase or a hidden storage compartment ...

A restored 1,500-year-old castle rises over the quaint central French town of Saint-Chartier. Royal, celebrity and even ...

In Roman times, the Passage of Commodus connected the Colosseum's box for the highest dignitaries to the outside world. Roma/IPA via ZUMA Press/dpa A long-hidden underground secret passage in Rome's ...

The property's 1920s charm comes with a fascinating history that includes hidden compartments discovered during a 2015 renovation. A historic lakefront property in Elkhorn, Wisconsin, with ties to the ...

Viral video just posted by a US rep shows a secret tunnel nestled under the floorboards of the US Capitol that, according to legend, was stormed by British soldiers in the War of 1812. Congressman Tim ...