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Landforms · Explainers

Why Is the Mediterranean Sea So Salty?

The Mediterranean is connected to the Atlantic, yet much of its water is saltier than the water arriving through Gibraltar. Its salinity reflects the combined effect of water…

Countries & regions · Map guides

Congo River Map: Course, Source, Countries and Basin

Where is the Congo River?The Congo River flows through Central Africa to the Atlantic Ocean. Its upper course is called the Lualaba; farther downstream it passes Kisangani, curves…

Cambodia · Countries & regions · Map guides

Mekong River Map: Countries, Course and Tonle Sap

Where is the Mekong River?The Mekong links the Tibetan Plateau with mainland Southeast Asia and the South China Sea. Its course runs through China, where it is called…

Lakes · Place guides

Rhône River: Alps, Lake Geneva, Lyon and the Delta

The Rhône links three very different landscapes: an Alpine valley, a large lake and a Mediterranean delta. Following the water through all three prevents a common map-reading mistake:…

Seine River · Landforms · Map guides

Seine River: Source, Paris, Tributaries & Estuary Map

Paris is the Seine’s most familiar setting, but it is only one part of a much larger river system. Upstream lie the Burgundy headwaters and tributary valleys; downstream,…