The Aliakmonas River is the longest river in Greece, stretching approximately 322 kilometers. It flows through the northern part of the country, originating from the Vardousia Mountains and eventually emptying into the Thermaic Gulf. The river is an important water source for agriculture and supports various ecosystems along its banks. The river basin is home to diverse wildlife and several towns, including Kozani and Grevena. The Aliakmonas also plays a significant role in hydroelectric power generation, with several dams constructed along its course. Its scenic landscapes attract visitors for outdoor activities like hiking and fishing.