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

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

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.

The remains of a small medieval chapel mark the legendary birthplace of the patron saint of Wales.

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

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

This 2,000-year-old tree inspired the nursery rhyme "Rock-a-bye Baby."

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

The home of Ireland's last leprechauns is officially protected by the European Union.

After mysteriously refusing to surrender at the end of World War II this sunken submarine was only salvaged in a search for Nazi gold.

A preserved 18th century steel factory.

The site of one of the largest non-nuclear explosions in history, created when a massive bomb dump accidentally exploded.

A thousand year old oak tree survives in Liverpool.

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

This mysterious hilltop collection of Druid carvings isn't quite what it seems.

Great Britain's only hat-making museum.

On a site with a long military history, a 1980s shelter.

The lake that fills and empties itself at random.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

Spend the night in this formerly abandoned traditional Scottish village.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.