The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

The largest bell in the world has been swinging high above a Cologne cathedral for almost a century.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

An elegant chandelier hangs over this ancient sewer chamber, now open for concerts and public tours.

A church filled with the bones of hundreds of virgins martyrs—or so they say.

A preserved college lock-up that recalls a clubhouse approach to discipline.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

Ruins of an aerial tramway that ran for only eight years.

World's largest barrel containing an inn.

This 600-year-old home seems to defy physics.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

The last bastion of Roman presence north of the Alps looms over a German town.

Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

The surprising home of the iconic Santa Monica Pier Ferris Wheel.

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

A museum honoring Oklahoma military service, where you can look into Hitler's mirror and see a Mickey Mouse gas mask.

An old spiral fire escape dangles above a public courtyard in Midtown Oklahoma City.

Travel through the hidden underbelly of the city in colorful tunnels filled with art and history exhibits.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

Sitting in the arguable birthplace of the Wild West, this museum holds the largest collection of bronco busting bric-a-brac in the world.

Tucked away on an empty wooded lot in suburban Oklahoma City lie the remnants of an abandoned circus camp.