Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The spectacular history of spectacles on display.

Europe's official "zero-level," the equator of elevation.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

The world's first floating farm is staffed by one human, three robots, and 35 cows.

A statue of the second-tallest Dutchman in history.

A true Valhalla for cactus and succulent lovers.

The Netherlands' first car tunnel has an unusually rectangular shape.

This abandoned island off the Venetian coast has been a radical monastery, a political prison, and a secret Nazi base.

This hidden alley near the location of Rome's first theater was the site of a curious miracle.

Ancient ruins hidden underneath a modern luxury hotel.

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

The studio built by fascists in the hopes of "reviving the film industry" with the occasional propaganda film opportunity thrown in.

One of several skulls claiming to belong to the beheaded St. John the Baptist is on display at this Roman church.

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

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

Architectureal fantasy quarter of Rome.

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

The world's longest wildlife overpass provides Hilversum's critters with a safe alternative to trying their luck on the roadway.

Building Men of War and Indiamen from Holland's Golden Age.

The elegant manor house where Kaiser Wilhelm II lived in exile after World War I.

Hop aboard a charming bog train to explore this rare open-air museum of peat.

This steel frame is a skeletal mirage of a lost 16th-century stone building.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.