Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

A 12th century church completely covered in shells.

This Soviet statue is based on a piece of propaganda that's been elevated to national myth.

In Kazakhstan, a colorful cathedral with many lives once survived the most powerful earthquake in the region.

One of the oldest and most significant collections of Ancient Egyptian archeology outside of Egypt.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

The oldest Roman lighthouse still in use.

Thanks to an acoustic anomaly, this unassuming stone bench has heard one hundred years of secrets.

With over 10,000 lights, this engineering marvel lights up the city after dark.

The secret room where early Bolsheviks cranked out propaganda fliers on a smuggled printing press.

A cluster of historic bathhouses built on the famed hot springs that gave the Georgian capital its name.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

A gigantic statue of a Russian soldier watches over the ancient city of Plovdiv, a prominent reminder of the Soviet period in Bulgaria.

Sofia's legislative center is continuously reinventing itself.

A vast Communist-era exhibition space in the Bulgarian capital.

"Holy Wisdom" overlooks the city that became its namesake.

A striking symbol of the Bulgarian capital.

A collection of art from Bulgaria's time as a communist state.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

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.

Lonely minaret stump of a destroyed city.

Dedicated to a Bolshevik revolutionary, this museum is a true time capsule of the Soviet era.