A fairy tale castle in modern Rome.

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

Architectureal fantasy quarter of Rome.

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

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

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

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

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

This former Roman Catholic Church still contains the embalmed hearts and organs of 22 popes.

Architectural monsters are devouring this palace's every door and window.

These ruins in Volvi were once at the intersection of the Eastern and Western Worlds.

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

Long-secret natural history museum, featuring the skull of a "Terror Bird."

6000-year-old site covered in more than 50 megaliths.