Explore hiking trails around Santo Antônio do Sudoeste, Paraná. The best hike near Santo Antônio do Sudoeste is Mirador Garganta Del Diablo via Circuito Garganta del Diablo, a 1.2 mile out and back trail in Parque Nacional Iguazú. Santo Antônio do Sudoeste has population 23673.0.