In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

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

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

The abandoned personal amusement park of the King of Pop.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

The hallucinogenic center of the ancient world.

Thousands of well-dressed mummies below a monastery.

This zoological museum began as the first great curiosity cabinet.

Medieval torture techniques with a modern conscience.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

An amazing collection of wax anatomical models and terratological models.

Pompeii's less famous neighbor is still revealing her secrets.

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

Ever hear of the Milazzo Cage?

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The largest and most famous wax anatomical collection anywhere in the world.

An extraordinary collection of 18th century anatomical waxworks.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.