Most visits to the Almudena Cathedral in Madrid ignore the eeriest part of the building, its crypt

The biggest outdoor modern mosaic in Madrid

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

One of Madrid's most beloved statues is of an anonymous citizen.

After the queen of Spain had a dream where these statues fell and crushed her, they were removed from the palace and given new homes around Madrid.

This enigmatic artifact is a rare depiction of an ancient Iberian noblewoman.

An iconic and controversial ancient Iberian funerary urn with a hauntingly penetrating gaze.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

Ancient pueblos built into the base of a natural canyon wall.

A spiritual vortex among the red rocks in Sedona.

This historic national park is covered in the stunning ruins of red rock pueblos.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

This sculpture presents commentary on a life in pursuit of profits.

There are lots of hands and feet stamped in the cement in front of Grauman’s Chinese Theater, but Mel left behind something extra.

The overgrown ruins of a once thriving World War I-era copper mine.

A volcanic tunnel illuminated by natural skylights offers a shaded respite from the desert sun.

Hundreds of drawings left by the land's previous inhabitants remain mysterious.

This mysterious petroglyph evokes the ancient swastika symbol but was later vandalized with the more troublesome Nazi one.

This nondescript tunnel has been featured in a number of iconic movies, from “Roger Rabbit” to “Back to the Future.”

Inside this library, the history of Los Angeles is retold through a mural.

A remote desert lookout offers unparalleled views of the California badlands for those who brave the trek.