While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

A famed artist's inspiring work of peace and tolerance.

An intricate and amazing house built by architect Karl Junker.

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

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.

A poem by Arthur Rimbaud is inscribed on the wall of a street that, while it is only one block long, plays a key role in multiple novels.

The remaining relics of the patroness of Paris lie in a chapel under a striking double spiral staircase.

Indents in the pavement are all that remain from a grisly death machine in Paris.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

This elaborate towering structure was once famed for its revolutionary height.

The so-called "Bridge of Thighs" in Palm Springs allows nudists to discreetly cross the road.

An extraordinary final resting place full of oversized art, amazing statues, and dead celebrities.

Dozens of feral felines rule a segment of Hollywood's only graveyard.

The blinking light atop the iconic landmark has been sending secret messages for decades.

This hilltop park offers magnificent views and a Frank Lloyd Wright masterpiece.

Most famous work of one of Frank Lloyd Wright's sons.

"Dallas’s pretty much only carnivorous plant gallery."

The first declared National Monument in the United States.

The site of the climactic scene from the classic horror film is now a historic landmark.

This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.