It seems that in Brazil every time they look for a place to build a racetrack they look for a spot near a river (just kidding!).
This is Porto Alegre´s racetrack, inaugurated in 1959 it has a 1928m dirt oval with a 700m straight, a 1600m chute off the backstretch and a 1900m chute off the clubhouse turn. It also has an inner turf oval with two far turns, with the larger oval measuring 1780m.
See larger map