WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY
Iguazu Falls. The name Iguazu is from the Guarani word for 'great water'. These waterfalls are a result of a volcanic eruption and lie on the Argentina-Brazil border (photographed from the Brazilian side). They are four times the width of Niagara Falls and are divided by islands into separate waterfalls. The Iguazu Falls are a UNESCO World Natural Heritage Site.
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