There might not be much left of these Irish ruins, but their linguistic legacy is still going strong.

This controversial Irish show cave is home to a massive formation known as the Great Stalactite.

The world's toughest modern Christian pilgrimage leads directly to the gates of Hell.

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

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

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

Once the longest bridge in Ireland, this rusting span sits abandoned and overrun by nature.

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

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.

Experience what life was like in Ireland during the Viking and medieval ages.

The oldest public library in Ireland.

An ancient neolithic tomb that only sees the sun twice a year.

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

A nun spent 16 years painting the stunning Celtic mural that covers the interior of this WWI memorial.

An unusual manor of stunning beauty, born out of a crippling disease.

Obelisks and stone pineapples in the Irish countryside.

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

A moody and picturesque riverside ruin overgrown with vegetation.

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

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

Local legend says the remains of Father Christmas lie within the medieval grounds.

One of the most popular megalithic sites in Ireland stands as a humbler version of Stonehenge.