This antique thermometer honors the creator of the first universal temperature scale.

Disused penal colony features prisoner artwork, some sketched in human blood.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

This Costa Rican topiary park is a surreal garden of unearthly delights.

These mysterious ancient stone spheres were created by a civilization lost to time and are now mostly lawn ornaments.

Abandoned ship reimagined as a street art canvas.

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

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

An amazing collection of curiosities hidden in a small Welsh village.

The only medieval bridge in Britain with its defensive tower still in tact.

The artist David Nash planted a circle of trees in 1977.

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

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

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.

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

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

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.

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

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

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 subterranean playground in an abandoned slate mine.