Ruins battered by centuries of war and disaster offer a wondrous glimpse of medieval Ireland.

This mosaic-lined medieval church was built by the world's first admiral and still holds mass in ancient Greek.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

A man throwing a giant severed hand towers over Antwerp’s main square.

Disused penal colony features prisoner artwork, some sketched in human blood.

Destroyed by flood waters, prison now serves as a training ground for armed forces.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

Replicas of fossils unearthed during renovation work reveal how this area would have looked millions of years ago.

Concrete spud looks like the North American Sebago.

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

All that is left of this medieval castle is two towers, both of which now display a visible tilt.

Also known as Rye Castle, this 13th-century fortification later became a prison and held one of Rye's most famous criminals.

These imposing walls and towers look more like the ruins of a fortress than a monastery.

This viaduct serves as a reminder of World War II.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

The largest hewn stone in history.

A strange rock formation with numerous legends trying to explain it.

A clock designed to run with perfect accuracy for 10,000 years.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

The medieval institution is home to the precious treasure stolen in World War II in one of the greatest art thefts of the 20th century.

Constantly maintained, this organ is playing a six-century long composition by John Cage.

The 3,600-year-old archeological sensation is considered to be the oldest representation of the cosmos.

This East German military command bunker was ready for World War III.