Rio Jari Rio Branco Rio Xingu Rio Negro
Niagara Angel Iguaca Victoria
Sodium Chloride Sodium Bitumen Sodium Carbonate
Norway United States Canada Iceland
22 sq km 22000 sq km 220 sq km 2200 sq km
Great Slave/Erie Superior/Crater Great Slave/Crater Erie/Crater
The Sudd The Everglades The Pantanal Okanvango Delta
Argentina Bolivia Paraguay Brazil
Waterfalls Deep Caves Geothermal Activity Icebergs
Volcano Desert Oasis Meteorite Impact Grazing Plain