A museum dedicated to the alleged Roswell Incident.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

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

An enormous, inside-out glass globe built in 1935.

An unusual round church in London with a Templar past.

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

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

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

This bridge was constructed from the rubble of the infamous Bastille.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Go inside to really appreciate this 500-year-old technological masterpiece.

Yo, Adrian!

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

A little sculpture with a large wardrobe.

The fairy tale castle of the "fairy-tale king."

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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