The final remnant of the Arkansas zinc industry is this historically protected ghost town.

A mysterious light of unknown origin on the backroads of Missouri.

The Ozarks' strangest dwelling.

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

The world's toughest modern Christian pilgrimage leads directly to the gates of Hell.

A corkscrew-shaped barn in Ireland.

An outstanding and haunting glimpse of the horrors of the Great Famine of Ireland.

A hugely vast Irish landscape of barren rock that stretches for miles.

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 world of the ancient Celtic civilization explained through a bewitching 11 acre garden.

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

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.

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

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

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

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

The oldest public library in Ireland.

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

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.

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