Bulgaria is a mysterious country in southeastern Europe, known for its long stretch of coastline along the Black Sea. While many tourists enjoy the country's summer and winter resorts, such as Albena, Golden Sands and Pamporovo, the less-travelled areas of Bulgaria offer a wealth of history, art and outdoor adventure. A popular destination is Sofia, the cosmopolitan capital of Bulgaria and home to the famous Hagia Sophia, a 6th-century church and cultural monument that was used as a mosque during the Ottoman rule. The interior of Bulgaria is full of well-maintained trails for hiking and horseback riding through ancient forests and mountains. The country's efficient public transportation system will take you to rural villages and monasteries, many of which date back to the Byzantine era and are filled with paintings and religious icons. Come fly with Austrian Airlines to Bulgaria and get a taste of ancient and modern Europe.