40 minutes from the center of Zacatlán is this valley that occupies an area of four square kilometers, adorned by its monumental stones that seem superimposed. They are 65 million years old, their figures have been formed by volcanic activity, chemical reactions and atmospheric agents such as rain, wind, sun and humidity. It is possible to camp on site.
There are multiple theories about the origin of these rocks, however the most accurate according to scientific studies by the Autonomous University of Mexico (UNAM) 2009, the rocks are of volcanic origin with an approximate age of 1.3 ± 0.2 million years , are part of a pyroclastic flow deposit rich in high-density crystals. In the place, strange stone sculptures caused by differential erosion are observed. They have the appearance of brown or dark gray lavas and are characterized by the high content of quartz and feldspar crystals. There are numerous elements that intervene in the carving of the profile of the rock remains, the heterogeneity of the chemical composition, their placement according to the direction of the winds and the climatic set to which they are exposed, are some of the causes of their irregular wear that They generated an inexplicable balance, great beauty and originality.