This little-known national museum houses over 40,000 works of art from across the world.

An abandoned tuberculosis hospital said to be haunted by the patients who died within its walls.

One of the world’s longest pedestrian suspension bridges.

An exquisite collection of fairytale conveyances that puts most car museums to shame.

A hidden three-foot-wide house separates these two regal churches.

The best place in the world to buy tinned fish.

A lush indoor jungle fills this bustling Madrid transportation hub.

This grand gate once marked the entrance to a military barracks.

This unassuming bookstore in the heart of Madrid is one of the oldest in Spain.

An iconic photograph from the Spanish Civil War saved this shrapnel-scarred historic house from destruction.

This embalmed man is one of the best preserved mummies from the Canary Islands.

This fascinating and poignant museum chronicles every imaginable aspect of Spanish colonialism in the Americas.

Inside this church are the alleged remains of the patron saint of lovers, epileptics, and beekeepers.

A unique exhibit lets blind people experience famous works of art and architecture with their hands.

A model solar system adds a celestial touch to this suburban park.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

A neighborhood represented by an apparent geocentric and flat-earth model of the Solar System is hidden in the subway of Madrid.

A saloon and inn that served the Wild West's most iconic figures—and is still haunted by some of them today.

On the edge of the Valles Caldera National Preserve, these rock formations create an eerie landscape.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A clear blue swimming hole with hidden caves, still unexplored.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.