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

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

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

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.

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

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

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

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

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

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

This Welsh hotel is the spiritual home of the British 1953 Everest expedition, the first successful ascent of Mount Everest.

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

Home to Alan Turing, the cracking of the Enigma code, and Captain Ridley's shooting party.

This ancient Bedfordshire church was abandoned when the village's population slowly began migrating to new towns.

This likeness of the famous revolutionary is entirely made of recycled scraps of metal.

A mysterious ancient network of thousands of perfectly straight lines stretching across miles of Bolivian desert.

An ancient Incan convent on Lake Titicaca's Island of the Moon.

The soaring gondola lines form the longest aerial cable car system in the world.

Museum dedicated to the sacred leaf of the Andes.

Astronomical observatory above Lake Titicaca.

Largest site of dinosaur footprints ever found includes more than 5,000 tracks.

The world’s highest ski resort was deserted after an 18,000-year-old glacier melted away.

This ancient hydrological marvel is now the base of a modern outdoor cinema.