Αχελώος is a significant river in Greece, known for being the longest river in the country. It flows through the regions of Thessaly and Epirus, eventually emptying into the Ionian Sea. The river is approximately 220 kilometers long and is an important source of water for agriculture and hydroelectric power. The river has historical and mythological significance, often associated with the ancient Greek god Achelous. It has been a vital resource for local communities, providing irrigation and supporting biodiversity in its surrounding ecosystems. The Achelous River is also known for its scenic landscapes and recreational opportunities.