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

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

An ancient Thracian city where fire rituals were practiced on the largest cult altar in Southeast Europe.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

Ruins of an early Roman Christian church dating back to the 4th to 5th centuries.

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.