Cedar Rapids is in a rich agricultural country.
The Trengganu river is obstructed by impassable rapids at a distance of about 30 m.
Above this place the navigation is interrupted by rapids.
To escape this danger many of them moved down the river and settled on the waste lands beyond the rapids.
He continued the ascent of the Parana as far as the rapids of Apipe, and finding his course barred in this direction, he afterwards explored the river Paraguay, which he mounted as far as the mouth of the affluent called by the Indians Lepeti, now the river Bermejo.