Aetolia-Acarnania is a regional unit in western Greece, formed by the merger of the historical regions of Aetolia and Acarnania. It is known for its diverse landscapes, including mountains, valleys, and coastlines along the Ionian Sea. The capital of the region is Messolonghi, which is famous for its rich history and natural beauty. The area has a significant historical background, having been inhabited since ancient times. It was home to various tribes and played a role in the Peloponnesian War. Today, Aetolia-Acarnania is recognized for its cultural heritage, archaeological sites, and natural attractions, making it a unique destination for visitors.