A breathtaking and biodiverse wilderness in the mountain setting of Ernest Hemingway's "For Whom the Bell Tolls."

The largest medieval water tank on the Iberian Peninsula is preserved beneath the Cáceres Museum.

This charming, medieval walled village is Spain's first "book town."

This underwater graveyard commemorates a group of murdered 16th-century missionaries.

Hidden well off the beaten path in Catalonia is this crumbling medieval castle that is slowly being covered in graffiti.

"Satisfying" is a good way to describe these beautifully aligned rows of Spanish mills.

An outsider folly near Madrid.

A whimsical garden of outsider art in the Spanish countryside.

Translating as "The Jump of the Girlfriend," this stunning waterfall has a tragic legend behind it.

The streets of a sleepy Spanish town proudly exhibit some of the world's finest graffiti.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

This enchanting natural park is a magical example of a temperate rainforest in Europe.

Haunted tuberculosis hospital built by the patients.

This mountaintop observatory is home to one of the world's largest reflective telescopes.

Blue-green pools and smooth stones comprise one of Spain’s most idyllic hidden wonders.

This enchanting hamlet carved into the rock looks like something straight out of Tolkien's Rivendell.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

Vibrant street art created with mixed media.

An abandoned Indian-inspired mansion.

Volcanic rocks ground down into sand make this Spanish beach as black as night.

Now a pile of ruins and rubble, this was a lovely mountain town as recently as 1960.

This "flat geyser" bubbles up out of the ground periodically like a disappearing river.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

A living art gallery painted on a canvas of Monterey pine trees.