Tamtoc, Tamtok or Tamohí is an archaeological site of the Huastec culture, located in the municipality of Tamuín in the Mexican state of San Luis Potosí, in what is known today as the Huasteca region. Since 2000 it has been improved and recovered by a team of professionals, with the archaeologist Estela Martínez Mora in charge of the studies at the site.
Originally it was estimated that the flowering of this site took place between AD 900 and 1100, that is, during the Mesoamerican Postclassic Period, however recent findings - particularly Monument 32 - have led archaeologists to think that the flowering could have occurred in 600 BC during the Preclassic.
Wikipedia https://en.wikipedia.org/wiki/Tamtoc
Address Mexico
Coordinates 21°55'27.003" N -98°48'50.788" E