A large replica of a monumental Roman inscription is located on the side of this museum.

A collection of objects supposedly singed by the hands of souls in purgatory.

The former home of an Italian artist is now a shrine to his ambitious works.

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

Harlequin costumes, signed scripts, and armor-wearing puppets.

This hidden alley near the location of Rome's first theater was the site of a curious miracle.

Its interior is adorned with some of the best examples of early Christian mosaics.

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

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

The final resting place of the poets Shelley and Keats.

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

A wunderkammer of curious objects and intriguing art nestled within a hub of ancient Roman sites.

A Nesting Doll of Churches.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

St. Francesca Romana, patron saint of drivers, resides in the church she founded.

This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

A Belle Epoque bordello turned into a themed love hotel.

The largest medical and anatomical collection in France lies hidden from the public.

The curious underground history of keeping Paris clean.

A grotto-like lodge decorated with gilded mosaics, rocks and a noisy waterfall was the setting for the most sumptuous pleasure house of 1900s Europe.

A surrealist timepiece by the artist of melting clocks.

Statue of death tucked in the University of Medicine courtyard.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

This massive library holds what was once the largest book collection in the world.