Located in the heart of South America, the Pantanal is the world's largest wetland and home to one of the densest concentrations of wildlife on the planet. It's a unique place where human activity and wildlife coexist. Here Brazilian cowboys ride herd alongside toothy caimans, giant otters, capybaras, macaws and toucans. In episode five, Art Wolfe arrives just as the seasonal floods have receded and discovers both an ecological paradise and a vibrant cowboy culture.