The world’s largest LED display, built over an F1 race circuit.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

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

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.

Amsterdam's former hotspot for public executions and dissections.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.

It's good luck to be mocked by this monkey.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

The last bastion of Roman presence north of the Alps looms over a German town.

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

City Council meetings still happen in this historic building, impeccably preserved on the inside.

What's that on the side of that building? Va Va Voom, it's Bettie!

This historic national park is covered in the stunning ruins of red rock pueblos.

What is the Thing?

This abandoned horse racing track was an exercise in hubris from its inception.