The largest known medieval map of the world.

Perhaps the only prehistoric monument with its very own public bus stop.

A circle stone within a stone circle.

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

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

Claiming to be the oldest hat store in the world, this historic haberdashery had a hand (and a head) in the creation of the Bowler.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Scattered throughout London are ancient remnants of the city's former bounding wall.

Hear the quietest sound from across the dome.

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

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

A piece of John the Baptist in the American heartland.

A remarkably opulent mansion with a tragic history.

This otherworldly church spire reaches up toward the heavens.

This mansion was made famous by its colorful cast of owners and location along the Sante Fe Trail.