I am the official currency of a country with a unique geographical feature known as 'The Devil's Throat'. My banknotes often feature images of native animals and landscapes, and I am divisible into 100 centavos.

1. I am used in a South American nation.
2. My country is famous for the Iguazu Falls.
3. I experienced a significant economic crisis in the early 2000s.
4. The peso is my name.