The Ponte Estaiada Mestre João Isidoro França crosses the Poti River with a tall central tower that doubles as Teresina's easiest viewpoint. An elevator takes visitors up for a 360-degree look over the river, the flat city, and the greener edges beyond.
The view is better than the bridge itself. Time it for late afternoon if you can, when the sun is lower and the heat has begun to loosen its grip.