Horrifically creative torture devices and shame punishments line the walls of this chilling museum.

This 14th century tower house was once the home of Irish poet W.B. Yeats.

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

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

A hoard of sky catalogs, astrophysical journals, even the works of Galileo and Copernicus.

One of the shortest streets in York has an especially odd name.

FDR's Art Deco hospital tower was hopelessly inefficient.

One of its engravings is believed to be among the first representations of medical and surgical instruments.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

Giant marble phalluses on the sacred island of antiquity.

Ancient serpentine sacrifice holder that has stood the test of time.

Ozymandias’ time-keeping temple.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls.

Venice's island of the dead.

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

Europe's largest prehistoric mound – burial site of a legendary king?

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Rebuilt remains of a temple to Roman god Mithras.

Colorful boxes placed over the dead are left to rot and crumble.

The house where John Wilkes Booth conspired with his co-conspirators.

This abandoned Poconos resort is haunted by a history of kitschy romance and a violent fugitive.