This massive blockhead sculpture hides an entire library.

A medieval military street hidden beneath a charming French fishing village.

Nearly every wall in this French villa has been "tattooed" by artist Jean Cocteau and other famous painters.

Every year, the town of Menton, France, turns lemons and oranges into giant sculptures depicting windmills, dragons, and more.

A beautiful discovery site of prehistoric burials.

There once was a man named Lear / Who found limericks so dear / His final resting space / Is an unusual place / Most people don’t know he’s here.

An ancient rogue artist community hidden next to one of the world's most glitzy and glamorous cities.

Ernest Hemingway was the first to sign this colorful wall covered in thousands of celebrity signatures.

The world's first underwater farm is home to more than 700 plants.

An abandoned village, frozen in time by the threat of a landslide.

The now-abandoned Fascist summer colony served a dark purpose during World War II.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

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

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

Hanging within this medieval church are the bones of a beast allegedly slain by a fourth-century saint.

Venice's island of the dead.

An island on the Venetian Lagoon hosts this stone chair that has nothing to do with the King of the Huns.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

The plague quarantine island home to the alleged "Vampire of Venice."

This sturdy, circular stronghold served as one of the forts that protected the Venetian Lagoon.

Originally a leper colony, the island is now an Armenian monastery that's home to an incredible manuscript library and eclectic museum.

Centuries ago, red and white wine poured from the statue's breasts whenever a new Venetian ruler was elected.