Bulgaria produces 85% of the world's rose oil โ a substance more valuable by weight than gold, requiring 3,000โ5,000 kg of petals to make just 1 kg. From the Thracian gold treasures buried underground for millennia to the ancient scripts that gave Russia its alphabet, Bulgaria is a country whose depth vastly outpaces its size.
Each round presents 10 randomized multiple-choice questions drawn from a pool of 50, so every playthrough is different. You get instant feedback with explanations after each answer, plus a shareable score at the end.
You'll explore the Rose Valley and its precious attar, the unique bacterial culture in Bulgarian yogurt, the Thracian gold treasures, the birth of the Cyrillic alphabet, Bulgaria's 500-year Ottoman period, and fascinating cultural customs like the reversed head-shake for yes and no.
Bulgaria is credited with producing the world's first true yogurt and is home to the unique bacterial strain Lactobacillus bulgaricus, named after the country. Bulgarian yogurt (kiselo mlyako) has a distinctly tangy taste and has been linked to the unusual longevity of rural Bulgarian populations.
In Bulgaria, the head gestures for yes and no are the opposite of most Western countries. A nod (up-down) means no, while shaking the head side to side means yes. The origin is debated, but it has been a consistent feature of Bulgarian culture for centuries and regularly surprises visitors.
Bulgarian rose oil (also called rose attar) is a prized perfumery ingredient extracted from Rosa damascena grown in the Rose Valley around Kazanlak. Bulgaria produces roughly 85% of the world's supply. It takes 3,000โ5,000 kg of rose petals to produce just 1 kg of oil, making it more expensive per ounce than gold and a key ingredient in iconic perfumes like Chanel No. 5.
Last updated: March 2026