In the South East are the Maya Mountains, where the sites of Ixkun, Sacul and Ixtonton are located, as well as the caves of Naj Tunich, which contain numerous painted hieroglyphic inscriptions. By this feature it is the place with the largest rock art from throughout the Americas.

First the earth was formed, the mountains and the valleys; the currents of water were divided, the rivulets were running freely between the hills, and the water was separated when the high mountains appeared.