Every equinox this Maya pyramid puts on a spooky ancient light show.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

Where Venice's gondolas go for a tune-up.

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

This zoological museum began as the first great curiosity cabinet.

The mummified relic of St. Antoninus.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A Nesting Doll of Churches.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

A stately palace has been converted into the world's largest cannabis museum.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

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

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

A museum dedicated to a secret military hospital hidden beneath a castle in Budapest.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.