This magnificent brick dome was made with an unusual design method.

This beautiful spit of land was once the summer playground of the king of 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.

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

This amazing example of Valencian Art Nouveau looks more like a cathedral than a public market.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

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

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

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

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

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

This influential Renaissance-era library was once the haunt of kings and monks.

According to tradition, King Phillip II supervised construction of the seat of his empire from this seat carved into rock.

This species of wild goat stars in witchy legends and frolics among the park's eerie rock formations.

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

A model solar system adds a celestial touch to this suburban park.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

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

The only urban monument in the world designed by the great surrealist painter Salvador Dalí.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

The remains of the second-oldest zoo in Europe can be seen within these library gardens.

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

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