The Danube is one of Europe's longest rivers, flowing through ten countries, including Germany, Austria, and Hungary. It stretches about 2,860 kilometers (1,780 miles) and is known for its beautiful landscapes and rich history. The river is a vital waterway for trade and transportation, connecting various cities and cultures along its banks. Many famous cities, such as Vienna and Budapest, are located along the Danube, making it a popular destination for tourists. The river is also home to diverse wildlife and unique ecosystems, providing habitats for various species. Its scenic views and cultural significance make the Danube a cherished natural treasure in Europe.