A popular legend claims that the famous pizza was invented at a restaurant in this alley.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

Destroyed numerous times, this centuries-old bridge has always been rebuilt with its original design.

The remains of 50,000 World War I soldiers rest under a towering arch overlooking the Alpine battlefields.

At more than 5,000 years old, these structures are among the oldest free-standing stone buildings in the world.

A centuries-old forgotten underworld lies beneath Malta.

Stone Age solar temple is aligned with the sun on each equinox and solstice.

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

A natural wonder in south Denmark.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A beer pipeline runs beneath Bruges.

This enormous sports car themed amusement park is home to the world’s fastest roller coaster.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

Whitewashed mosque contains the world's largest carpet.

This indoor ski resort has a mountain contained inside a mall.

This artificial archipelago was supposed to resemble a map of the world.

For centuries, Jeddah’s old town was a major trading port and a point of entry for Hajj pilgrims traveling by sea.