This one-room schoolhouse in rural Arkansas dates to the 1920s, but looks like it could be the 1820s.

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

A collection dedicated to the treatment of disease, held in London's oldest hospital.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

The longest hedge maze in the world.

Famously misunderstood wonder of the ancient world

A tongue-in-cheek arcade where the games are based on everyday life.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

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

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

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

Britain's only herd of free-ranging reindeer.

A scattered trail of street art adds a pop of color to the city's stark structures.

At high tide this strange footbridge appears to have no purpose whatsoever.