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

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

A corkscrew-shaped barn in Ireland.

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

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

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

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

Some of the saint's blood and bones are said to reside in Dublin.

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

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

The oldest public library in Ireland.

Catholics make up 84% of Ireland's population but this Dublin museum remembers the small but important Jewish community.

A magnificent winding road through a steep valley, with deep natural caverns at the bottom

Wallabies live naturally on this Irish island.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The great Danube river starts here.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Since 1874, this macabre collection has developed into a museum devoted to Scotland Yard's mementos of dastardly deeds.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Electrical curiosity museum housed in an old transformer station.

Budapest's Communist-era statues, banished to the suburbs.