Rome's semi-secret peephole vista is also a former Crusader stronghold.

Architectureal fantasy quarter of Rome.

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

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

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

This real life asylum of horrors is now an abandoned ruin that hides the unbreakable code to one patient's insanity.

Abandoned cemetery of the former Psychiatric Hospital of Volterra.

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

Fortified medieval tower house with lovely roof garden.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

The oldest volcanology research center in the world.

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

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

This water-tower-turned-high-end-apartment building was once the site of an early Nazi concentration camp.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.