The largest and most famous wax anatomical collection anywhere in the world.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

The middle finger of modernity.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

Twelve grave-faced marble angels guard the emperor's tomb at Les Invalides.

Remains of Roman amphitheater hidden in a sleepy quarter of Paris.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Mountain where Jesus was first tempted by the Devil.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

New York City's smallest piece of private property.

Odd outsider art installations surround a Gold Rush-era ghost town.

The first declared National Monument in the United States.

Try not to get slimed in Tribeca.

The rocks in this arid basin leave trails of movement behind them.

Giant topiary dog once played a role in a terrorist bomb plot.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

A mistaken marker makes an erroneous claim along the historic Old Divide Road.