Its collection includes a broad array of social, geographic, graphic design, and political history.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

The beloved beast's taxidermy remains sit in the Natural History Museum's cafe.

This ancient Roman arch misled treasure hunters for centuries.

In 2013, historians discovered a hidden room devoted to the art of making royals' hot chocolate.

This rare effigy of the author spent years lost in storage.

The medieval woodcut-style artwork chronicles life in medieval London.

One of Chicago's last seafood smokehouses perfects a dying breed of fishcraft.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

Kentucky's longest operating jail is now a spooky spot to spend the night.

Legend says this demonic carving inside a medieval cathedral was one of Satan's minions.

An architectural oddity hides in plain sight on this iconic London bridge.

The little-known second castle that William the Conqueror built in York.

Locals place their offerings on this nightmarish gnarled tree so the witches won't summon another storm.

This historic sunny-yellow building has an unfortunate connection to the sinking of the Titanic.

A plaque marks the humble origins of an artistic muse who embodied the ideals of Pre-Raphaelite beauty.

A curiosity-seeker's paradise set inside a three-story historic school house.

A historic hotel library in Indiana hides more than a few secrets on its shelves.

Where condemned pirates met their grisly end at the gallows on the River Thames.

The oldest of the three remaining bridges in England with buildings on top of them.

Hanging within this medieval church are the bones of a beast allegedly slain by a fourth-century saint.

The bones of two medieval royal lions were discovered at the historic fortress.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.