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

Just another ancient, mysterious Irish stone circle.

This natural sea arch highlights Ireland's rugged coastal beauty.

The ruins of a medieval monastery named after a type of tree.

Petrified footprints of one of the very first vertebrates to walk on land.

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

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

The world's tallest box hedge is found in a delightful garden.

Ireland's most remarkable collection of these curious cone-shaped houses is worth the buzz.

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

Huge standing stones mark a site of megalithic mystery.

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

A stunning Victorian abbey and walled garden on a lakefront.

Wander among the abandoned ruins of this once-powerful medieval town.

The home of Ireland's last leprechauns is officially protected by the European Union.

Just a few miles off the western coast of Ireland lies an isle steeped in Irish literary history.

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

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

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

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

The somber sculptures commemorating Irish Famine on the river Liffey in Dublin.

There might not be much left of these Irish ruins, but their linguistic legacy is still going strong.

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

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.