Where condemned pirates met their grisly end at the gallows on the River Thames.

Black cat statues guard this temple-like Egyptian revival factory.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

A gorge full of caverns where early humans lived alongside cave hyenas, giant mammoths and wooly rhinoceroses.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

Sometimes an island, sometimes a rocky outcropping connected to the world by a tiny suspension bridge.

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

A perilous medieval road leading right into the sea.

Even after the church tried to wipe the practice out, this pagan festival lives on each year in a small Scottish village.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.

A petite castle folly in the English countryside.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

The strange behavior of a tween led to allegations of witchcraft and a curse being placed on anybody within earshot.

This Scottish manor house is a lush relic from the life of a literary great.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

This Scottish burial tomb once held hundreds of ancient eagle bones.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

Enter the world under the hill at this ancient UK burial chamber.

Local legends say that fairies used to dance in the moonlight here and invite handsome young men into their grottoes.

One family's environment-friendly hobbit-house in Wales.