Ancient ruins hidden underneath a modern luxury hotel.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

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

Overlooked amid the tourist bustle of Florence, this museum is dedicated to the craft of stone inlay.

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

"The prettiest love letters in the world" ... or so said Lord Byron.

A huge enchanting public park just outside the ancient walls of Rome.

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

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

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

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

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

Art and armour fill every inch of this rich kid's Italian villa.

The studio built by fascists in the hopes of "reviving the film industry" with the occasional propaganda film opportunity thrown in.

Long-abandoned art nouveau baths beneath Milan's Piazza Oberdan.

Rome's ancient Etruscan rival, now a park full of ruins.

A modern sliver of architecture in Roma.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

Secret refuge and museum of the Duke of Florence.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

A Milanese café entirely designed by the American director Wes Anderson.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.

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

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