This mysterious underground cave in Shropshire dates back to the 18th or 19th century.

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

Picturesque ruins once held off mighty armies.

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

This 6th-century church honors St. Tudno, the patron saint of Llandudno.

One of the few surviving street funiculars in the world.

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

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

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

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

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

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

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.

A subterranean playground in an abandoned slate mine.

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

A tiny village in Wales claims the name of a noble medieval hound slain for a crime he didn't commit.

This massive memorial commemorates those who died in the Manchester Arena bombing.

Fulham F.C. imploded once everyone excised its giant, hated tribute to the King of Pop.

This bronze statue stands throughout the year and illustrates an urgent message about the environment.

Once used to protect important Roman trade routes.

The construction of this bridge dates back to the 15th century.

A tiny, hidden alleyway dedicated to the father of meteorology.