Go inside to really appreciate this 500-year-old technological masterpiece.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

The mark of the Devil's horns on a marble column in Milan.

Da Vinci's equestrian statue, 500 years in the making.

This ominous Albanian fortress houses tanks and downed planes as a reminder of their victories over Western imperialism.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

A piece of outsider public art accompanied by a strange urban legend.

Where an entire elephant skeleton, a snakeskin table runner, and thousands of animal remains become art.

A white Buddhist temple with a golden restroom.

Divinely-inspired village houses 6,000 dolls, plus strange and lovely outsider art.

An ancient Egyptian temple in the middle of Madrid, Spain.

The silly symbol for an underground protest group is now scattered around the city.

An ancient knight and a symbol of the city's freedom.

A hotel and restaurant serving as the mecca of kitsch.

Haunting and beautiful trees, doomed to die.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Elevated freight railway turned wildly successful urban park.

Avoid gangster interaction while window-shopping.

The most confusing clock in New York.

Cryptic messages embedded in the New York City sidewalk.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.