The southern part of the state of Tocantins is an integral part of the biomass called cerrado , one of the geographical peculiarities of which is to be a plateau presenting in various places massifs more or less high. On the other hand, the notion of steppe is becoming more important in the north: there are two types of vegetation - the herbaceous steppe , on which the edges are more or less sparse, or the steppe with trees . Above, even further north, there is the catinga which combines another type of vegetation adapted to the harshness of hot climates. On the other hand, the climate changes, the days become warmer and the nights cooler.
*The small town of Ponte Alto de Tocantins .
The Jalapão occupies an area of 34 thousand square kilometers, containing eight municipalities (Lagoa do Tocantins , Novo Acordo , Lizarda , Mateiros , Novo Acordo , Ponte Alta do Tocantins , Santa Tereza do Tocantins and São Félix do Tocantins ). The main rivers that cross or have their source on the plateau of Jalapão are : Sono , Rio das Balsas , Novo , Galhão , Prata , Soninho , Vermelho , Ponte Alta , Come Assado , Frito Gordo , Caracol .
*The waterfall of the river Soninho .
*The mountains range of Jalapão constitutes a plateau dotted with springs, streams and rivers.
*The waterfall called Velha (old) fed by the river Novo .
Downstream of the waterfall called Velha , a deposit of sand in one of the meanders, allowed the appearance of a small beach. The transparency of the water is great. The Rio Novo is one of the last totally christalline drinking water rivers in the world.
*The dune of the Jalapão Park is one of the geological features of this region.It reaches more or less 40 meters in height, a height which is constantly growing, and the orange color of the sand only increases the unequaled spectacle of color at sunset.
The park is located to the southeast of the state of Tocantins, in a region joining the borders of several states (States of Tocantins , of Maranhão , of Piauí , fo Bahia ). The population is very negro, due in particular to the migrations that took place during the eighteenth century due to the great famines that undermined the state of Bahia. The immigrants drove out the Indians because this area was rich in game.