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

Romans built the world's tallest artificial waterfall in 271 BC.

Pilgrimage site for star-crossed lovers.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

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

Geothermal waterfalls in Tuscany.

This medieval church in Rome was almost destroyed following a terrorist attack in 1993.

This small church was constructed over the ruins of three temples dating to the Roman Republic.

A sculpture serving as an homage to Pope John Paul II.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

This Italian stadium makes liberal use of fascist statuary to evoke classical sporting arenas.

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

A massive marble foot is tucked away in a small alley near the Pantheon.

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

In the early Roman Empire, people deemed traitors and criminals were tossed to their deaths from this rock.

Gods clash with machines in a power plant regenerated as a museum.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

This is the oldest Roman-made bridge in the city still existing in its original state.

This curious, round temple is the oldest still-standing marble building in Rome.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

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

This ancient Roman prison is decorated with an upside-down cross not as blasphemy but as saintly tribute.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.