A small, but very well curated, museum of cars, propaganda, and toys of socialist Bulgaria.

A decaying, yet still functioning, work of communist architecture.

Rebuilt several decades ago, its striking murals prevent it from being reconsecrated as a church.

An homage to the medieval rulers of Bulgaria.

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

An abandoned saucer-shaped monument in the Bulgarian mountains.

This massive stone and steel monument remembers a century-old battle that cost thousands of lives and nearly destroyed the city.

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

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

A shopping mall housed in a historic cinema and hiding ancient ruins under its floors.

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

Eastern Bloc nostalgia, anybody?

A flamboyant five-story building in Bulgaria resembles a crawling snail.

Sofia's legislative center is continuously reinventing itself.

A striking symbol of the Bulgarian capital.

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

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

This curious sculpture represents the perseverance needed to take to the skies.

Check the time in 145 countries at once with this East German relic.

A socialist building dedicated to teachers showcases one of the largest Soviet mosaics in the world.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

The "Prussian Versailles" that is as glorious today as when it was built.

This stone once marked the boundaries of Liverpool's medieval markets.

Most of Britain's gold reserve was secretly stashed here after the start of World War II.