Дон is a major river in Russia, flowing from the Donets River in the Central Russian Upland to the Sea of Azov. It spans approximately 1,950 kilometers, making it one of the longest rivers in Europe. The river is known for its historical significance and has been a vital waterway for trade and transportation. The Don basin is rich in biodiversity and supports various ecosystems. It is also famous for its cultural heritage, particularly in the Don Cossack region, where traditional customs and lifestyles have been preserved. The river plays a crucial role in agriculture and fishing, contributing to the local economy.