This tunnel looks like a sliver of Shanghai that's stuck in the past.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

England's most famous front door has an accidental doppelganger.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

The first public library in the Americas has more than 45,000 books dating back to the 15th century.

Some charming, but sadly, unloved animal statues call this park home.

An out-of-place slice of France, smack in the middle of Shanghai.

The once highest point in China blends symbolic design with a kick of adrenaline.

This extraordinary art museum is like a secret world on the edge of Mexico City.

These ruins of a medieval church are full of architectural mysteries.

Still standing despite its considerable slant, this tilted lighthouse has become a local symbol of resilience.

Local lore claims this rocky cape hides a lost Aztec treasure.

One of the few places where you can visit a cenote and Maya ruins at the same time.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

The final resting place of the great navigator, or maybe his brother.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A beautiful example of 18th-century engineering still standing tall.

An American ghost town hides along a side street in Scotland's capital.

This stack of stones honors a murdered 18th-century woman.

This sculpture commemorates Edinburgh's sister city and their respective celebrity dogs.

One of the world's richest men bought this former paper factory and transformed it into a mall.

A coastal monument honors one of Mexico's most notable immigrant groups.