Wallabies live naturally on this Irish island.

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

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

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

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

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

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

The oldest public library in Ireland.

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

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

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

A corkscrew-shaped barn in Ireland.

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

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

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

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

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

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

Obelisks and stone pineapples in the Irish countryside.

One of Ireland's most infamous prisons for rebels including men, women and children.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

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

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

This floating garden in the sky is straight out of a fairy tale, but the real thing is nothing short of magical.