Visit the Pantanal, a haven for animal life that's also one of the world's most unforgiving habitats. Here, over 80 species of mammals, 300 species of fish, and 650 species of birds must constantly navigate the changing seasons, as the harsh dry season gives way to powerful floods. In this giant tropical wetland, home to iconic South American animals like giant otters, jaguars, piranhas, and capybara, everything revolves around water.