Erotic art covers the walls of the largest ancient pleasure palace.

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

Breathtaking and huge 430 year old maps of Italy.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

Medieval torture techniques with a modern conscience.

These medieval skyscrapers dominate the skyline of this small Tuscan town.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

The oldest operating pharmacy in the world features 800-year-old recipes.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

Fountain where visitors can earn a license to be mad.

A 16th-century horror show built in a lovely Italian garden.

Home to a protest movement, a bombing, and a dramatic change in labor history.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A hollow cement depiction of time's inexorable effect on the human body.

Paranormal activity on the great lakes.

The rocks in this arid basin leave trails of movement behind them.