A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.

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

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

What looks like a normal building is really a hollow facade hiding a subway vent.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

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

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

The walls and streets of the ancient city are peppered with penises.

Breathtaking and huge 430 year old maps of Italy.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

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

Virgil's many-mouthed gateway to the underworld.

Italy's third-largest Roman arena gives a peek into the underground operations beneath the ancient spectacles.

Nobles would stage mock naval battles on this large lake at the Royal Palace of Caserta.

This Roman amphitheatre was also the location of the first gladiator school.

The underground sanctuary of a mysterious ancient Roman religious cult contains an exquisite traditional fresco.

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

Italy's "New Mountain" rose from the ground in a volcanic eruption in 1538.

Pilgrimage site for star-crossed lovers.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.