Founded in the 4th-century, the town of Pernik plays host to the Surva Carnival⁠—a magnificent display of masked Kukeri dancers.

This historic black and white monastery is one of Bulgaria's architectural jewels.

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

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

Sofia's legislative center is continuously reinventing itself.

This building has two facades of clashing architectural designs.

Underneath this Byzantinian church lies a necropolis filled with ancient tombs and the ruins of previous churches.

A striking symbol of the Bulgarian capital.

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

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

The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.

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

An homage to the medieval rulers of Bulgaria.

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

These cascading falls resonate throughout the Bulgarian forest.

A massive cave once a secret military base is now home to thousands of bats.

An abandoned saucer-shaped monument in the Bulgarian mountains.

A magnificent, glittering building tucked into a tiny Bulgarian mountain town.

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

At this 16th-century monastery in rural Bulgaria, visitors can also spend the night.