This magnificent arch is all that remains of a former smelt mill.

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

A breathtaking flower tunnel bursts with beautiful golden blossoms.

Britain's only artificial surfing lake is nestled in the beautiful mountains of Wales.

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.

A subterranean playground in an abandoned slate mine.

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

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

Three bridges straddle a stream, one stacked upon the other.

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

This 19th-century island fort built to protect against an invasion by sea.

This rocky outcrop served as a quarry for some of the bluestones that sit at the center of Stonehenge.

This magical grotto is adorned with a complex pattern of native seashells, minerals, and fragments of colored glass.

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

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

Tucked among the sand dunes overlooking a Welsh beach, a real-life tribute to a fictional elf.

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

Go back 50 years with a turn on one of the park's carefully restored vintage fairground rides.

This former military airfield's claim to fame came from a lucky accident during the Second World War.

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

This tall stone wall with no door and ill-matched windows was built centuries ago, and used as a shelter for domesticated pigeons.