Waterways:
 | 671,886 km (2004) top ten longest rivers: Nile (Africa) 6,693 km; Amazon (South America) 6,436 km; Mississippi-Missouri (North America) 6,238 km; Yenisey-Angara (Asia) 5,981 km; Ob-Irtysh (Asia) 5,569 km; Yangtze (Asia) 5,525 km; Yellow (Asia) 4,671 km; Amur (Asia) 4,352 km; Lena (Asia) 4,345 km; Congo (Africa) 4,344 km note: if measured by volume, the Amazon is the largest river in the world |