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.

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

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

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

Famously misunderstood wonder of the ancient world

The celebrated eyesore created by starry-eyed sweethearts.

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

Macabre astrological automaton clock dating to the late 1400s.