This ancient Irish tower could easily have stood in for Rapunzel's prison.

Wander among the abandoned ruins of this once-powerful medieval town.

This 30-foot pile of rocks may be the grave of a mythological Irish queen.

The ruins of an 800-year-old monastery boasts the tallest round tower in Ireland.

A spectacular hidden beach in Ireland has the dark, disturbing nickname of "Murder Hole Beach."

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

A nun spent 16 years painting the stunning Celtic mural that covers the interior of this WWI memorial.

A remarkably intact castle that once was the largest in Ireland.

A moody and picturesque riverside ruin overgrown with vegetation.

Obelisks and stone pineapples in the Irish countryside.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

An ancient neolithic tomb that only sees the sun twice a year.

A corkscrew-shaped barn in Ireland.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.

The world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

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.

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

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