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

Budapest's Communist-era statues, banished to the suburbs.

The ancient tomb acts as a calendar that keeps perfect time.

An ancient neolithic tomb that only sees the sun twice a year.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

An antique cemetery in New York, this land is home to any number of famed corpses.

The oldest operating pharmacy in the world features 800-year-old recipes.

Secret refuge and museum of the Duke of Florence.

The world's most elegant power lines.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

A unique seaside cave where Aleister Crowley faked his own death.

Two large posteriors in one giant statue.

Giant granite sculptures representing family on the northern coast of Spain.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

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

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

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

A daily pyrotechnic celebration marks a beloved tradition during Valencia's festival season.

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.