This 47-story "M" needed 20 years to be completed

Beautiful tiles decorate many of the town's surfaces and stand testimony to its glorious artistic history.

A celebration of solstice followed by a fiery purging of evils.

This abandoned, turn-of-the-century astronomy hub is now the subject of more photographs than it ever took.

An eerie collection of the surviving structures from a past celebration of the future.

An eccentric collection of antique items shares space with a prop-quality witchcraft museum.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

A 16th-century Andalusian palace.

"Alleys of Stone" form natural mazes in Spanish natural park.

Rare karst landscape eroded from a flat seabed.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

Moorish signal station on a stratgic rocky outcrop.

The world's largest wooden structure.

A Spanish town built into the cliffs.

The final resting place of the great navigator, or maybe his brother.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Bacteria and algae give the salty water its bubblegum hue.

Three bridges and one giant canyon make up this fantastic Spanish settlement.