Poti

The Poti rises in the uplands of Ceará and cuts through the Ibiapaba escarpment before joining the Parnaíba. Its canyon exposes layers of rock sculpted by the river, and engravings along its course testify to a long history of human movement through the region. The river links the dry northeastern interior with the plains of the Parnaíba basin.

The later city of Teresina lies here.