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

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

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

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

Secret refuge and museum of the Duke of Florence.

Contains some of the world's more disturbing wax anatomical models.

One of the largest caves in the world open to the public.

Southern Italy's spinning top village.

These gutted monastery ruins still stand proudly in the middle of the Italian countryside.

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

The oldest botanical garden in the world that technically isn't the oldest.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

The world's oldest surviving anatomical theater, where "the dead are pleased to help the living."

In the world's oldest university is a stunning 17th century anatomical theater carved from spruce.

The only theatre in the world constructed specifically for sound movement.

Spiral labyrinth hidden in the hills above Oakland, CA.

San Francisco Bay's ghost town.

Furniture tries to escape an abandoned building in San Francisco.

The most visited, and possibly most controversial, museum in Germany.

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

It houses the remains of a 17th-century version of the Titanic.

Ancient burial grounds of the wealthy.

A Barbary Coast watering hole built into a Gold Rush shipwreck.

Prone to disastrous fires, the city of San Francisco has the Guardian, a fireboat gifted by residents, to watch over them from the bay.