Mountain where Jesus was first tempted by the Devil.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

Turntable anonymously received orphans, alms, and groceries.

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

The prolific artwork of a self-taught sculptor.

An impressive home made of stone, carved more than a century ago.

This enchanting hamlet carved into the rock looks like something straight out of Tolkien's Rivendell.

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

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

An outsider folly near Madrid.

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

Mysterious Spanish catacombs of unknown origins.

A huge cathedral single-handedly constructed by one eccentric monk.

An exact replica of a colossal Olmec head sits atop a pyramid within a Madrid traffic circle.

This amazing abuela became a diehard metal fan late in life and an icon of Madrid's '80s rock scene.

The lengthy skeleton of one of the tallest Spaniards of all time is on display in Madrid.

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

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

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

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

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

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