Here at south is located the largest canyon of south America, dividing the states of Rio Grande do Sul and Santa Catarina(It's called Aparados da Serra). I heard a geologist talking on TV that the difference between these here and the canyons of north America, is that here the canyons were formed during the divisions of the continents, and its composition is from rocks but because of the weather, they also have a dense vegetation, greenery and water.