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.

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

The earliest known map to show America, discovered by accident at a Paris bookshop.

Stunning Roman aqueduct used for 1900 years and still standing.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

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.

A lush indoor jungle fills this bustling Madrid transportation hub.

Mountain where Jesus was first tempted by the Devil.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

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

This cemetery features modernist statues as strange as its name.

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

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

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

A house covered entirely with shells.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

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

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Rare karst landscape eroded from a flat seabed.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

The current seat of the Parliament of Andalusia was once the epicenter of the Great Plague of Seville.

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

A 16th-century Andalusian palace.