An 1814 castle that hosts an exhibit of "explorabilia".

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

After being destroyed by IRA sympathizers, the ruins of this stately Irish manor have sat vacant for decades.

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

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

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

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

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

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

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

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

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

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

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

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

A moody and picturesque riverside ruin overgrown with vegetation.

The oldest inn in Kilkenny was established by the first convicted witch in Ireland.

Obelisks and stone pineapples in the Irish countryside.

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

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

This ancient Irish religious site is covered in ancient carvings, many of which have barely aged.

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

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.