The 발칸 반도 (Balkan Peninsula) is a region in Southeast Europe, bordered by the Adriatic Sea to the west, the Ionian Sea to the southwest, and the Aegean Sea to the southeast. It includes several countries, such as 그리스, 불가리아, 세르비아, and 크로아티아. The peninsula is known for its diverse cultures, languages, and histories, shaped by various empires over the centuries. The geography of the 발칸 반도 features mountainous terrain, fertile plains, and numerous rivers. It is home to significant natural landmarks, including the 다르다넬스 해협 and the 아드리아 해. The region has a complex political history, often marked by conflicts and shifting borders, particularly during the 20th century.