This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

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

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

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

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

The little-known second castle that William the Conqueror built in York.

One of the shortest streets in York has an especially odd name.

Follow the original medieval paths that wind through this intriguing section of the city.

A century-old tradition has culminated in a small but singular collection of feline effigies.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

An elaborate memorial to a man local legend says died of a broken heart.

One of Frank Lloyd Wright's greatest—and favorite—architectural masterpieces was almost lost.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

The world's largest wooden structure.

A quaint village in Western New York named after Alexander Hamilton's beloved sister-in-law.

Town full of spiritualists, some of whom are mediums, is still in full swing after 130 years.

A natural gas leak provides a flickering flame beneath a waterfall.

This former hub for crafty philosophers was founded by a writer who died aboard the infamous RMS Lusitania.

A preserved factory in the "Home of the Carrousel" is now a museum dedicated to the classic wooden ride.

This Tennessee museum is dedicated to a tragic railroad hero who inspired the famous ballad that bears his name.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.