Fantastically decorated underground chambers built in the 1760s.

Created hundreds of years ago, the magical follies and landscapes at this park were almost lost to time before being restored.

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

Picturesque ruins once held off mighty armies.

These haunting ruins belong to an ancient village that once had one hell of a view.

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

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

A breathtaking flower tunnel bursts with beautiful golden blossoms.

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

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.