This 5,300-year-old tomb with mysterious carvings crowns an Irish mountain.

Modern sundial uses ancient methods to tell time and date perfectly.

The largest portal tomb in Europe has a capstone weighing around 150 tons.

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.

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

A collection of housewares from recent Irish history adjoined by a tower from ancient Irish history.

A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

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

Achill's most recently abandoned village dates back to to the Age of Enlightenment.

A standing relief of a Norman knight whose posture marks him as a Crusader.

The remains of this deep, dark mine have left behind a haunting rocky warren of tunnels.

This burial pyramid in central Ireland is thousands of miles and thousands of years away from its Egyptian inspiration.

Just another ancient, mysterious Irish stone circle.

A steam trawler with a whiskey-soaked history driven ashore in 1960 resides rusty but still standing on the shoreline.

The oldest licensed distillery in Ireland.

Certain traditions prevail on the least-visited island of the Aran Islands.

This Irish museum in a historic 19th century market pays tribute to the glory of butter.

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

An 1814 castle that hosts an exhibit of "explorabilia".

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

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

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.