These imposing walls and towers look more like the ruins of a fortress than a monastery.

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

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

Huge standing stones mark a site of megalithic mystery.

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

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

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.

A rocky Irish outcropping with a history of wealth, conflict, and ruin.

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.

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

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

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

A moody and picturesque riverside ruin overgrown with vegetation.

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

Some say this medieval church is where the poet Dante married his wife and also met the love of his life.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

2300-year-old Roman road connecting the empire.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.