Oliver Cromwell once seized the land under this house, which included the ruins of a medieval abbey that the owner used to build his stately home.

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

Experience what life was like in Ireland during the Viking and medieval ages.

There might not be much left of these Irish ruins, but their linguistic legacy is still going strong.

A rocky Irish outcropping with a history of wealth, conflict, and ruin.

An unusual manor of stunning beauty, born out of a crippling disease.

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

Obelisks and stone pineapples in the Irish countryside.

Local legend says the remains of Father Christmas lie within the medieval grounds.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

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.

Perfectly preserved ancient monastery in an impossibly dramatic location on a rocky island in the Atlantic.

A moody and picturesque riverside ruin overgrown with vegetation.

Archduke Ferdinand II's collection of rare objects is considered one of the oldest museums in the world.

This outsider art house has gone from clinical creation to astounding artwork.

The shell of a medieval fortress offers commanding views of the area it once protected.

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.

Artfully arranged bones of 5,800 Austrians.

A 16th-century horror show built in a lovely Italian garden.

A neo-Gothic mansion now houses a wunderkammer of analog tech that hits on all the senses.