Bulgaria is rich in mysteries, from the Varna Necropolis, holding the world’s oldest gold treasure, to the enigmatic site of Perperikon. The Thracians, an ancient people, built Perperikon, and their rituals and beliefs, including fire rituals and human sacrifices, remain subjects of fascination and mystery. The site’s limited excavation also contributes to its mystique. Bulgarians also have a unique cultural tradition of nodding their heads for “no” and shaking them for “yes