What is the longest river in the world?

Which river carries the most water of any river on Earth?

The Amazon River flows into which ocean?

The Danube River flows through how many countries?

The Nile River flows northward through Africa before emptying into which body of water?

Which is the longest river in Europe?

The Yangtze River is the longest river in Asia. Through which country does it run?

Which river forms the border between the United States and Mexico for much of its length?

The Congo River is notable for being the world's deepest river. On which continent is it located?

Which river system is considered the cradle of Western civilization?