A measuring mishap led to these artificial stone ladies losing their stomachs.

Hidden beneath the streets of London is a secret subway that only carried mail.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

The burial place of an obscure North African saint was turned into a macabre body preservation factory for the 17th-century Neapolitan elite.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

A visionary Italian architect created an impressive cluster of concrete structures for a family's private tomb.

Now an entertainment complex, the Lingotto building was once an avant-garde auto factory with a test track on the roof.

The Neapolitan Cult of the Dead still cares for the skulls at this mini-Fontanelle.

Two stone columns flank the grand Venice square, but there were supposed to be three.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

The oldest botanical garden in the world that technically isn't the oldest.

A medieval fountain lined with 99 unique stone faces whose origins and meaning remain unknown.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

The Emperor Tiberius' palace of debauchery.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

A 1,000-year-old church holds the bones of the Christian martyrs who died hiding inside it.

Geometry and mystery come together in an epic show of octagonal masonry.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

Dug as a secret royal escape route, the tunnel became a wartime bomb shelter and dumping ground for vintage cars.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

A fake medieval village in the middle of Turin.