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

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

Jesus' footprints and the first catacombs in the world.

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

2300-year-old Roman road connecting the empire.

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

The underground sanctuary of a mysterious ancient cult.

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

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

Architectureal fantasy quarter of Rome.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

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

A new sculpture calls attention to climate change in the centuries-old city it threatens.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

Where Venice's gondolas go for a tune-up.

Armenian monks at an island monastery in the Venetian Lagoon make a rare rose petal jam.