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

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

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

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

Picturesque ruins once held off mighty armies.

This neolithic stone grave has been altered and restored so often its now more neo than lithic.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

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

The highest peak in Wales is said to be the final resting place of a giant killed by King Arthur.

This abandoned asylum in Wales might look haunted, but it's still beautiful.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

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 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.

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

A Byzantine church containing the holy remnants of three saints sits atop the site of an ancient temple.

A Byzantine-era church hidden in a wooded area below the Acropolis.

A grotesque collection of wax limbs depicting the symptoms of venereal disease.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.