The last municipal pneumatic post system in the world was in operation for over 100 years, and may run again.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

Rising from the sea like a stone monster.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

Amsterdam's Red Light District leaves little to the imagination.

This cemetery features modernist statues as strange as its name.

Week-long block party becomes a competition for the best decorated street.

These striking ruins of a castle resemble a ship's stern.

18th century anatomical amphitheater of the Royal College of Surgery of Barcelona.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

Mountain where Jesus was first tempted by the Devil.

Abandoned outpost once home to a murderous tyrant.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

Spend your honeymoon where the Devil had his wedding.

World's largest working waterwheel has been around for over 150 years.

The Guardian of Tallinn.

This Funeral Hearse Museum represents the finest in cadaver transportation.

The history and future of cannabis.

A beautiful but toxic fountain of mercury.

Where the embers of the Big Bang were first detected.

A perfect circle of twenty-four mysterious holes dates back to prehistoric time.

A unique collection of gilded age mechanical pianos.

A stunning cemetery famous for its extraordinarily delicate & lifelike mourning sculptures.

A former imperial sea-fortress and Soviet prison.