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

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

This Scottish graveyard is the final resting place of the man who inspired the character Ebenezer Scrooge.

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

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

From here, the loch appears to take the shape of mainland Scotland.

Twice a day this ancient path disappears with the tides, leaving the Holy Island of Lindisfarne out to sea.

The medieval-looking hammer beam teak roof may be a Victorian vanity, but it's still absolutely magnificent.

This museum honors the young maritime hero who became an unexpected Victorian-era celebrity.

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

A genuine Tudor manor transported piece by piece from England.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

Edgar Allan Poe's old dorm is now a shrine to the author's legacy.

The oldest arched-covered bridge in Virginia has truly withstood the test of time.

Lines from a walking song are etched into a rock in Natural Bridge State Park.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

This temple was constructed entirely by Roman soldiers.

Also known as "Robin Hood's tree," this tree became a famed location along Hadrian's Wall before it was cut down in an act of vandalism.

Parts of the civil rights movement unfolded in this historic eatery, helmed by the "Queen of Creole Cuisine."

One street divides a single town that stands in two U.S. states.