The park was created in 1961 by the then President of the Republic Juscelino Kubitschek and it took the name of Parque Nacional do Tocantins (due to the source of the Tocantins river in this region).
It changed its denomination when the state of Goiás was divided in two parts, Goiás keeping the southen part and the creation of the future state Tocantins in the north (1st January 1989)..

The point of view called whale.
On this side, one can indeed guess the outlinee of the marine mammal whale.