London's smallest police station is barely the size of a phone booth.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

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

Famously misunderstood wonder of the ancient world

The most loyal of little dogs, or a Victorian era publicity stunt?

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

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

This early version of the guillotine was used to execute the man responsible for its construction.

This 16th-century house tells the city's history through old artifacts and quirky tales.

Brass bricks outline the locations of Edinburgh's lost, lively market stalls.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

An 18th-century religious argument etched into stone.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

Hidden deep within New Jersey Pine Barrens is a massive graffiti wonderland.

An unassuming island in the middle of the Hudson that hosts campers, including Aleister Crowley.

A World War II-era submarine is stuck in the mud in New Jersey.

Seven golden statues rise into the sky from sculptor Victor Victori's New Jersey front lawn.

Edison's cast-in-place concrete houses were a failure, but way ahead of their time.

In the power of this waterfall, Alexander Hamilton saw the potential for industry.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

An allegedly cursed tree represents a town's reckoning with a racist past.

Thousands of Matchbox cars spanning generations call this New Jersey barn home.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.