A self-built mosaic house and sculpture park.

This domed temple was built in a hidden cave mouth as a refuge for sinners seeking absolution.

Medieval town turned hippie commune, once home to the secret foreskin of Jesus Christ.

This Italian stadium makes liberal use of fascist statuary to evoke classical sporting arenas.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

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

Architectureal fantasy quarter of Rome.

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

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

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

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.

An alchemist's "magic door" stands in the middle of a Roman park.

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

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

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