This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

A pocket of jungle amidst urban expansion in Panama.

Fortified medieval tower house with lovely roof garden.

A lover's walk between hilltop towns, decorated with graffiti love notes.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

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

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

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

The bomb-ravaged remains of of a colossal Neptune.

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

This picturesque Umbrian city has a subterranean side that has long remained hidden.

Ancient snack bar of the Roman Empire re-opened.

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

Five candy-colored villages on the Italian Riviera.

Venice's island of the dead.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

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

The final resting place of the poets Shelley and Keats.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Venice's "Island of the Mad."

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.