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