A temple is a cenote

The Mayans believed that on the passage from the underworld to the afterlife your soul is reborn again. The underworld is the gateway to immortality. The soul is carried down a river, mostly an underground river called a cenote. A cave incorporated into a mountain is the access point to the river. As you travel down the river there is a transition in which salt water and fresh water meet called a halo cline. Once through and on the other side, this is where you have traveled and reached Xibalba. There are nine places where rivers come out of mountains. Similar to this, Pakal built the Temple of Inscriptions using the idea of a mountain,cave and a river. The river that floes nearby to the palace and the temple will be where the soul is carried to the afterlife. Pakal wanted to create a temple where mountain,cave and river unite.

In my map the horizontal lines create the nine levels of the underworld and the access point. The shifted vertical lines are similar to the river and the halo cline, the transtional point from the underworld to the afterlife. The series of vertical and horizontal interweaved lines create the two and a half years the Mayans believe it would take for one to travel to Xibalba. The void above is the above is the final destination in which the soul is reborn.