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

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

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

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

Stunning Roman aqueduct used for 1900 years and still standing.

Cliffside houses provide a spectacular view from their perch above the valley.

The world's largest wooden structure.

Village situated on a narrow volcanic escarpment.

A Spanish town built into the cliffs.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.

Bacteria and algae give the salty water its bubblegum hue.

An ancient Egyptian temple in the middle of Madrid, Spain.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

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

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

These boots are made for selfies.

The Grand Canyon of Texas.

A popular swimming hole that hides one of America's most deadly diving spots.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

A modernist landscape of water and sci-fi concrete.