What sets this sanctuary apart from similar temples in Oaxaca is that, despite being located in a flat valley, it's surrounded by a few vegetation-covered mounds. These are not natural hills—they're actually unexcavated Zapotec ruins, completely buried and overgrown. It's believed that these people regarded the location as sacred due to a fossilized human footprint, attributed to 1 of the 1st humans to have existed following the Zapotec creation myth.