A daily pyrotechnic celebration marks a beloved tradition during Valencia's festival season.

This house's itty bitty size means no humans allowed.

This abandoned viewing platform has become a monument to unnecessary government spending.

Vibrant street art created with mixed media.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Walk into an underground archeological dig, the site of the Roman Forum that was once the center of Valencia.

This architectural oddity is an oasis of green on the outskirts of Valencia.

Inaugurated three times, this tower offers some of the best views of Madrid.

Meant to resemble a massive tree, the building is the best example of Spanish organicist architecture in Madrid.

This 18th-century project to build the world's tallest gravity dam was never completed.

Remains of the lost church hide beneath this Spanish Parliament building.

Stuck in the middle of a modern Madrid city block are the remains of a 19th century sports complex.

This small museum tucked within a subway station holds pieces from Madrid's past.

A subterranean relic of the Spanish Civil War hides below this picturesque park.

Earth's rocky history has rarely glittered so brightly as it does in this Spanish museum.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

One of the world's oldest universities houses an incredible collection of anatomical models, mummified body parts, and human bones.

Madrid's last horchata kiosk is a blue-and-white beacon of refreshment.

The morbid items in this small and hidden museum are not for the weak stomached.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

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

Where once there was a train station bathroom, there is now this German burger joint.