An ancient holy well said to be used by the patron saint of sailors and travelers, lost in the boggy west of Valentia Island.

See some of the world's greatest racing horses at this idyllic thoroughbred breeding facility and garden complex.

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

Ancient Bronze Age rampart that was used into the middle ages.

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

Just another ancient, mysterious Irish stone circle.

This single room has survived the centuries with almost no deterioration.

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

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

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

Huge standing stones mark a site of megalithic mystery.

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

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

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

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

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

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.

The ancient tomb acts as a calendar that keeps perfect time.

The oldest public library in Ireland.

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."