A former watering trough turned local heritage site.

A medieval abbey featured on 'Game of Thrones' that dates back to the 12th-century.

The "Black Arch" guards the entrance to the picturesque Glens of Antrim.

These barriers stand as stark reminders of Northern Ireland's troubled past.

This tiny train shuttles passengers to one of Northern Ireland's most spectacular sights.

It is said a heartbroken man visited the gap every day to stare blankly out at the sea.

This Italian-style temple replica has been threatening to fall off the Irish coast for hundreds of years.

A peace symbol in Northern Ireland is among the world's largest hedge mazes.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

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

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

A massive Celtic cross secretly growing in an Irish forest.

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

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

Achill's most recently abandoned village dates back to to the Age of Enlightenment.

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

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

Huge standing stones mark a site of megalithic mystery.

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.

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