Quirky Welsh observatory unites art and science.

The largest of only eight working transporter bridges left in the world.

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

A modest stone circle in North Wales.

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

Legends say that this small island was the final resting place of the Welsh saint of lovers.

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

Recently restored menagerie of Victorian-era beasts.

The enormous earthwork sculpture honors the ponies that lived and worked in the old colliery.

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

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

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

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.

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

This Roman amphitheater is said to be King Arthur's legendary Round Table.

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

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

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

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

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

A medieval cave used to shelter local hermits now holds nearly 200 old Quaker gravestones.