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

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

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

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

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

Huge standing stones mark a site of megalithic mystery.

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

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

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

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

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

A spectacular hidden beach in Ireland has the dark, disturbing nickname of "Murder Hole Beach."

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

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

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

A corkscrew-shaped barn in Ireland.

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

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

A moody and picturesque riverside ruin overgrown with vegetation.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

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

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

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

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