A micro-communist utopia in Spain with no police, no mortgages and full employment.

A contemporary art installation housed within a Gothic cathedral.

Seaside ruins of a settlement that date back to the first century B.C.

A Spanish artist builds his own castle.

This remarkable prehistoric town is full of watchtowers and houses that have withstood thousands of years.

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

The Gaudí-inspired building that was the start of Terrassenc modernism.

A magnificent place to see authentic paleolithic cave paintings that are an astounding 33,000 years old.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

A historic Christian shrine nestled within a spectacular natural cave.

An out-of-place grove of sequoias thrives in northern Spain.

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

Vibrant street art created with mixed media.

This postmodern apartment block was designed to be a vertical neighborhood.

A breathtaking canyon offers stunning views and frightful pathways through an ecological paradise.

This century-old ruined temple was reborn as "The Church of Skate."

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

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

Peek into a cave of giant, glimmering crystals.

A medieval village holds a very modern hotel.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.

This ancient Spanish castle sits high upon a hilltop.