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

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

Ancient snack bar of the Roman Empire re-opened.

The oldest volcanology research center in the world.

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

A rather vulgar example of the transition from Latin to the Italian vernacular.

A Nesting Doll of Churches.

This ancient market is often referred to as the oldest shopping mall in the world.

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

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

Plaques on its facade commemorate the Tiber's most destructive deluges.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

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

A statue representing a lost Roman profession that was vandalized for centuries.

A forgotten "city of water" underneath the famous Trevi district.

Believed to be the remains of the lost Temple of Minerva, this nymphaeum has been known by its misnomer to this day.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

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

An alchemist's "magic door" stands in the middle of a Roman park.

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

Mysterious wreckage of a small plane has been lodged in this tree since at least 1971.

Cascading outward, this waterfall creates the appearance of a flowing veil.

The large fjord lake is thought to be the home of "Ogopogo," a giant sea serpent.