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.

The modern birthplace of Irish freedom.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

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

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.

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