The ancient latrines of the Greeks, in all their public glory.

Roman ruins top white travertine terraces formed by ancient hot springs.

Ancient serpentine sacrifice holder that has stood the test of time.

A marvel of Byzantine engineering under the streets of Istanbul.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

Despite being pillaged and destroyed a number over times down the centuries, this historic church still sort of stands.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Religious perseverance and cultural coexistence manifest in an architectural gem that multiple wars couldn't topple.

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

A beautiful but toxic fountain of mercury.

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.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

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

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

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.

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

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

The oldest restaurant in the world is this old-world Spanish eatery, still known for its suckling pig.

Commonly acknowledged as the only public monument to the Devil himself.

A towering work of stone and philosophy that was constructed using ancient Hindu science.

The remains of what was, not so long ago, the world's largest city.