This psychedelic tromp l'oeil seems to be beckoning drivers to crash into a wall.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

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

Home to items never before seen by the public.

Scattered throughout London are ancient remnants of the city's former bounding wall.

An abstract monument to a symphonic composer.

A semi-scholarly approach to sex.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

Hundreds of hidden passageways weave through the old quarters of Lyon.

For hundreds of years, automatons moving to metallic music have been marking the passage of time.

Real bones which are said to have belonged to a Polish dragon.

An underground city of salt.

This shop specializes in oddities and Victorian-inspired wonders.

Tucked in the back of this amazing antique store is an important piece of medical history.

Century-old shop, specializing in Occult products.

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

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

Fantastic collection celebrating the final send-off.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

World's first "penitentiary," meant to be humane, drove men insane.

Arlington Cemetery exhibit dedicated to death and grieving.