At first glance, this area seems like just another city park, but the lush landscape hides a dark past.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

Macabre museum devoted to historical Viennese murders.

The unsettling remnants of a torn down movie set lies nearby the ruined location of the actual Płaszów Labor Camp.

"The House That Love Built" is shying away from "The House That Ghosts Love."

A wall of chewing gum moonlights as collective art.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

A gothic church spire sits atop this skyscraper, the tallest church in the world.

In Paris, Texas they have their own Eiffel Tower, it just has a cowboy hat on it.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This institution collects the history of burlesque dancing with a titillating collection of ephemera and pasties.

The best Tiki bar in Las Vegas.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A half-size replica of the World Trade Center towers above Tulsa.

Home to the story of the outlaw turned funhouse mummy, Elmer McCurdy.

This museum holds not just a world class collection of firefighting artifacts and gear but even the region's first fire station itself.

This unusually circular centenarian barn became a Route 66 icon.

It reportedly took three years to sort through all the objects in this eclectic lifelong collection.

Built from oil field parts and resembling a teepee, this abandoned mid-century church is hoping for a comeback.

A museum and apothecary garden devoted to the history of frontier medicine.