These precariously placed ruins harken back to a 13th-century castle.

The longest and tallest aqueduct in Britain can actually be sailed across.

This abandoned asylum in Wales might look haunted, but it's still beautiful.

A look into the life of a Victorian-era prisoner.

Following years of secrecy, the hidden history of a World War II site is being brought to light.

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

Abandoned ship reimagined as a street art canvas.

This 1776 beacon on the coast of Wales is said to have a ghost called Raymond, the last lighthouse keeper.

Picturesque ruins once held off mighty armies.

The decaying ruins of Wales' first asylum for the mentally ill.

After years of slow decline, a derelict Gothic castle is now being restored to life.

The world's largest prehistoric copper mine had 30,000 animal bones scattered throughout the maze of passageways.

One of the few surviving street funiculars in the world.

This ancient castle has been abandoned since the Edwardian conquest of Wales.

The worst flood disaster in Welsh history might have been a lot worse if it had not happened on movie night.

This neolithic stone grave has been altered and restored so often its now more neo than lithic.

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

A little-known castle set in a nature reserve.

The remains of centuries of copper mining appear like an alien landscape.

The lighthouse is on a island which is connected to another island, which is connected to another island, which is connected to one of the largest islands in the world.

Legends say that this small island was the final resting place of the Welsh saint of lovers.

An abandoned quarrying village turned commune is now a hub for learning the Welsh language.

The stately remains of Llywelyn the Great's mighty fortress.

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.