The Nile is the world's longest river. From elephants and leopards to extreme kayakers and ancient wonders, its great length provides a lifeline for Africa's wildest beasts and for some of the world's most incredible cultures.
The Amazon amasses one-fifth of Earth's freshwater as it flows east from the Andes to the Atlantic. Boiling streams, crystal clear lagoons, pink river dolphins and a strange new reef are some of its many secret and extreme worlds.
From the frozen north--where coyotes learn to fish in icy water--down through the nation's agricultural heart and to the mysterious, steamy southern swamps where alligators still rule, the many faces of the Mississippi unite a nation.
