This 5,300-year-old tomb with mysterious carvings crowns an Irish mountain.

An ancient holy well said to be used by the patron saint of sailors and travelers, lost in the boggy west of Valentia Island.

This 14th century tower house was once the home of Irish poet W.B. Yeats.

Ancient Bronze Age rampart that was used into the middle ages.

Impressive mining ruins overlook a spectacular view of Ireland's Copper Coast.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

The largest portal tomb in Europe has a capstone weighing around 150 tons.

An important pilgrimage site for pagans and early Christians, named for a Celtic goddess-turned-saint.

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

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

Ruins battered by centuries of war and disaster offer a wondrous glimpse of medieval Ireland.

A collection of housewares from recent Irish history adjoined by a tower from ancient Irish history.

The 19th-century pharmacy (now a used bookstore) was featured in James Joyce’s "Ulysses," and has changed very little to this day.

A standing relief of a Norman knight whose posture marks him as a Crusader.

Certain traditions prevail on the least-visited island of the Aran Islands.

A moody and picturesque riverside ruin overgrown with vegetation.

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

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

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

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

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

The enchanting archway is the only surviving portal into Dublin's lost medieval wall.

The oldest public library in Ireland.

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