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

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

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

A sacred well steeped in Pagan roots on the West Coast of Ireland.

These imposing walls and towers look more like the ruins of a fortress than a monastery.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

The world's first experimental nutritionist is memorialized as the "Hippocrates of naval medicine."

This extraordinary Viking artifact has traveled throughout the city.

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

The oldest working mechanical clock in the world.

Europe's largest prehistoric mound – burial site of a legendary king?

A medieval abbey featured on 'Game of Thrones' that dates back to the 12th-century.

A retired military stronghold on the rolling green coast of Donegal.

Ruins battered by centuries of war and disaster offer a wondrous glimpse of medieval Ireland.

The world's tallest box hedge is found in a delightful garden.

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

After being destroyed by IRA sympathizers, the ruins of this stately Irish manor have sat vacant for decades.

A moody and picturesque riverside ruin overgrown with vegetation.

The 20th-century chapel’s intricate woodwork includes amazing details, most notably angels playing bagpipes.

Modern megaliths form this work of cosmic, Celtic landscape art.

The remains of a grand castle that may have inspired Bram Stoker's Dracula.

Near the former site of numerous witch burnings, this lavish Edinburgh mainstay pays homage to Scotland's brutal history.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.