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

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

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

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

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

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

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

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

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

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The remains of a majestic house that was once stood in the crosshairs of the Irish Republican Army.

The oldest public library in Ireland.

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

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."

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