The skulls and bones of thousands of soldiers line the walls of this small Italian chapel.

One of seven Jewish catacombs in Rome and one of only two open to the public.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Remnants of a 4th-century church with vivid medieval frescoes and ancient sarcophagi hide beneath this old basilica.

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

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

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

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

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A burial vault located under Tiber Island in the middle of the Italian capital.

This field of half-buried stone crosses was the burial place of a sect of heretical gnostics.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.