Semi-precious Blue John stones have been mined in this cavern system for centuries.

6000-year-old site covered in more than 50 megaliths.

Eyam took steps to quarantine themselves and keep the plague from spreading.

Seat of the Duke and Duchess of Devonshire for centuries.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

Picturesque ruins once held off mighty armies.

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

The longest hedge maze in the world.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

The first archaeological site discovered by aerial photography.

The oldest working mechanical clock in the world.

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

Storms, funding, and in-fighting have kept this Bermuda church from ever being completed.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Giant naked man on a hillside.

Europe's largest prehistoric mound – burial site of a legendary king?

Fascinating town where normal life interfaces with the occult.

A giant white horse drawn on an English hillside may not have been intended to be a horse at all.

Now nearly dry, this lake is said to be the ancient home of the Lady of the Lake, and was once thought to be bottomless.

A fantastic castle rumored to be the birthplace of King Arthur.