A gorgeous medieval library where the books are kept in chains.

An extraordinary house museum and cabinet of curiosities in the heart of Florence.

A white Buddhist temple with a golden restroom.

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

An enigmatic modern marker left next to a historic Roman site.

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.

The Pope’s secret escape route.

A fairy tale castle in modern Rome.

After being lost for decades, this striking mural depicting the atomic bomb covers the wall of a busy Tokyo metro station.

The legendary birthplace of the Japanese maneki-neko is dotted with hundreds of lucky beckoning cats.

More tin toys than you can shake a clapping monkey at.

The demolished ruins of a poorly located Japanese Love Hotel.

The Andean town where every single building is decorated with a brightly colored frieze.

A submerged archeological park still holds the wonders of a Roman Sodom.

Virgil's many-mouthed gateway to the underworld.

A tree that defies gravity grows in an ancient ruin.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

Erotic art covers the walls of the largest ancient pleasure palace.

Ancient snack bar of the Roman Empire re-opened.

Pompeii's less famous neighbor is still revealing her secrets.

A sulfuric hellscape in southern Italy.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

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

An eccentric home in Sicily turns heads on a regular basis.