Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This church is named for one of the most dramatic tales in the early Christian church.

Celebrated in poem, this tiny hidden cemetery has a big and grisly history.

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

A local student's chance encounter with Keith Haring led to the creation of one of Europe's largest murals.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

The secret medieval communication system will whisk your words above the noise of the crowd.

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

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

Rome's first modern graffito is all that is left of a peaceful protest from the 1970s.

An 18th-century post box used to alert the church of sick and ailing foreign pilgrims.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

Breathtaking and huge 430 year old maps of Italy.

An unremarkable wooden wheel built into the side of one of Rome's oldest hospitals was part of a policy to reduce infant exposure.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

Ancient snack bar of the Roman Empire re-opened.

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

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

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

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

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

High in the clouds of San Marino sits an ancient tower with some curious prisoner graffiti.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.