Bolivia/Peru Colombia/Brazil Bolivia/Brazil Chile/Argentina
Niger Orange Zambezi Okanvango
Venezuala Argentina United States Brazil
Ross Ice Shelf Okanvango Delta Angel Falls Vatnajokull
Bolivia/Peru Colombia/Brazil Argentina/Brazil Chile/Argentina
Zambezi Nile Amazon Congo
Seine Mosel Volga Rhone
Florida Texas Virginia California
Colombia/Chile Brazil/Chile Argentina/Chile Bolivia/Chile
S. America Europe N. America Africa