The ruins of a monastery that dates to the 7th century.

The largest stone circle in Ireland.

A mysterious Neolithic tomb is perched along the edge of a modern golf course.

A Neolithic passage tomb said to have sheltered two legendary Irish lovers.

This Neolithic passage tomb forms part of a World Heritage Site.

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

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

These gigantic skeletons tower over visitors and provide insight into the creatures that once ruled over Ireland.

This Bronze Age tomb is the centerpiece of a clearing within a beautiful Irish forest.

An ancient chamber filled with wonderful rock art and a Neolithic carving of a human face.

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

A hugely vast Irish landscape of barren rock that stretches for miles.

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

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

Just another ancient, mysterious Irish stone circle.

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

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

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

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

Huge standing stones mark a site of megalithic mystery.

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

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

This ancient Irish landscape boasts hundreds of legendary ruins.

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