An unremarkable wooden wheel built into the side of one of Rome's oldest hospitals was part of a policy to reduce infant exposure.

Believed to be the remains of the lost Temple of Minerva, this nymphaeum has been known by its misnomer to this day.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

A microbiologist-chef is slinging noodles with hyperlocal Nordic ingredients.

A grove of colossal man-made flowers built to collect the sun's rays.

A beautiful young girl said to have been buried alive in her coffin…

Legend says these colorful, invasive residents are the descendants of birds released by Jimi Hendrix.

Hear the quietest sound from across the dome.

The bronze uniforms commemorate the vital role of women during World War II.

An architectural oddity hides in plain sight on this iconic London bridge.

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

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

The last four extravagant street signs of London's historic banking street.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

Eclectic final resting place of the controversial explorer.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

The television series' iconic giant foot was borrowed from this classical painting.

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

The final resting place to 300 Victorian-era pets hides inside the city park.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.