A contemporary art installation housed within a Gothic cathedral.

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

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

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

A 16th-century Andalusian palace.

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

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

This former charity hospital for elderly clergy houses some of Seville’s most treasured paintings.

Abandoned waterpark turned counter-culture mecca.

The oldest Roman lighthouse still in use.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

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

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

A lush indoor jungle fills this bustling Madrid transportation hub.

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

A temple to modernity, tucked away amid Barcelona's more well known museums.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

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

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

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