An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

The Emperor Tiberius' palace of debauchery.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

The bomb-ravaged remains of of a colossal Neptune.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

100 year tradition of fist fights, marked by marble footsteps.

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

Secret refuge and museum of the Duke of Florence.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

Five candy-colored villages on the Italian Riviera.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

Go inside to really appreciate this 500-year-old technological masterpiece.

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

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The glowing blue Nymphaeum of Emperor Tiberius.

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

Thousands of well-dressed mummies below a monastery.

The 5.5-mile ring of steel posts around the Capitol Building is one of the largest (and most uniform) of its kind in the world.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

Washington's iconic carousel has a nice piece of Civil Rights history.

Before Nixon, "watergate" meant canals.