A remnant of the original World Trade Center complex continues to serve as a commuter gateway.

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

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

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

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

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

Despite the name, this 16th-century structure in Galway wasn't built by the Spanish.

For fans of the stained glass art of Irish illustrator Harry Clarke, this church is the place to be.

A stunning Victorian abbey and walled garden on a lakefront.

This cemetery overlooking the Benbulben rock formation is the final resting place of one of Ireland's most beloved poets.

A museum dedicated to the tragedy of Bloody Sunday.

These murals stand as reminders to the troubled history of this Northern Ireland city.

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

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

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

Beautiful scenery provides the backdrop for an abandoned coastguard facility.

Amazing vistas await visitors to this stretch of coastline.

This stone harbor was key to Carnlough's limestone industry.

A glimpse into the last days of a once-booming past fishing industry.

This castle once belonged to one of the most prominent families of medieval Carrickfergus.

This stone pays homage to the diaries written by Gideon Bonnivert.

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

This massive monument has been telling the time for 150 years—at a slight angle.