The yawning maw of this pagan visage is said to bite off the hands of liars.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

The final resting place of the poets Shelley and Keats.

The underground sanctuary of a mysterious ancient cult.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

A forgotten "city of water" underneath the famous Trevi district.

Architectureal fantasy quarter of Rome.

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

Jesus' footprints and the first catacombs in the world.

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

Rebuilt remains of a temple to Roman god Mithras.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

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."

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

A rare view of a preserved Victorian science museum.

A layered tribute to the work of mosaicist Isaiah Zagar.

World's first "penitentiary," meant to be humane, drove men insane.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

Near the ruins of a Civil War coastal fortress lies the only known African refugee cemetery in the United States.

A small poultry graveyard in the courtyard of a popular Key West watering hole.

The island residents are known for taking their quirky sense of humor with them to the grave.