A 200-year-old bar is all that remains of one Mississippi River town's rough-and-tumble past.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

This temple contains what might be the world's oldest optical illusion.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

One of the only places where Earth’s mantle lies above water.

This reconstructed Norman castle is the world's most accurate, from location to livestock.

One of the world's steepest streets seems to have houses sliding down it.

This 600-year-old home seems to defy physics.

This brilliant display of whirling fireballs celebrates Hogmanay.

The national headquarters of the dowser’s society founded in 1961.

These are probably the most beautifully-crafted toilets you've ever seen.

The oldest candy store in the world has been selling traditional sweets since 1827.

An English brewery transported to North Korea.

This clock was gifted to Mexico as a show of gratitude for its long history of welcoming Arab migrants.

Flowers have mysteriously appeared on her effigy every day for the last 150 years.

A marble Lucifer hides behind the pulpit of this Gothic cathedral.

A favorite haunt of Delhi's politicos and intellectuals, this old-school coffee shop was shut down under Indira Gandhi's Emergency.

This café is dedicated to serving coffee roasted by Native American-owned companies.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Designed as a labyrinth, this subterranean prison was crafted without bars or doors.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.