This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

Five candy-colored villages on the Italian Riviera.

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

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

2300-year-old Roman road connecting the empire.

Drink wine handed out through a window as part of an age-old tradition.

This legendary city has been a tourist attraction for centuries.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

The hallucinogenic center of the ancient world.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

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

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

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

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

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

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

An extraordinary house museum and cabinet of curiosities in the heart of 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.