This former Welsh metal factory is now a lovely abandoned relic but was once one of the industry's world leaders.

The enormous earthwork sculpture honors the ponies that lived and worked in the old colliery.

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

The world's smallest movie theater runs on solar power—an attraction in itself.

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

A former fisherman's hut deemed too small for habitation is now a delightful tourist draw.

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

A real-life Professor Snape once taught in this Welsh university building, which students of course nicknamed “Hogwarts.”

A spiral staircase connects the limestone cave with Pembroke Castle, birthplace of King Henry VII.

One of the world's oldest trees comes with a Welsh legend intertwining it with a spirit prophesying death.

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

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

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

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

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

A breathtaking flower tunnel bursts with beautiful golden blossoms.

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

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

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

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

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

A subterranean playground in an abandoned slate mine.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.