Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.

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

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

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

A controversial art piece that harkens back to local folklore.

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

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

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

The Spanish king's private bathroom embraced the idea of a porcelain throne.

These markers are used to document elevation changes around the famed dam.

A homage to the King at the hotel where he revived his career.

Temporary Burning Man sculpture made of two 18-wheelers.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Performers, intricate sets, and a real speakeasy tell the story of the 18th Amendment.

This 19th-century sugarcane plantation is one of the most well-preserved estates of its kind, including its original quarters for enslaved laborers.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

To find the "unicorns of the deep" you've got to go downstairs.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

These pretty kitties killed and ate as many as 135 railway workers.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.