After it was swallowed by a Georgian mansion, this medieval castle remained forgotten for centuries.

A particularly disconcerting tribute to Irish martyrs.

The Grand Lodge of Ireland is one of the oldest in the world, full of fantastical, elaborately themed rooms.

This courtly monument celebrates an influential comedian who turned taking the piss out of the powers-that-be into an art.

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

Amidst the bustling streets of Dublin, there is a hushed garden that is dedicated to "All those who gave their lives in the cause of Irish Freedom."

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

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

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

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

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

An Irish church where an 800-year-old mummy is reaching out of his coffin as if to shake hands.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A mysterious plaque to the even more mysterious "Fr. Pat Noise," killed in "suspicious circumstances."

The ancient tomb acts as a calendar that keeps perfect time.

It is said a heartbroken man visited the gap every day to stare blankly out at the sea.

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

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

This Italian-style temple replica has been threatening to fall off the Irish coast for hundreds of years.

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

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

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

Ireland's only German military cemetery holds the remains of a spy who was moved there under the cover of darkness.

A teddy bear sits on a chair watching the sunset from the mountaintop—just as the late Dan Clancy had done since childhood.