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You’ll find thousands of petroglyphs and archaeological artifacts in the remote deserts of Nuevo León. Boca de Potrerillos (Potrerillos Mouth) is one such site. It has been studied for many years, but for a long time, its creators were a mystery.
Although the Spanish wrote extensively about the indigenous people of Mexico, they made no mention of a large civilization in the northeast. As such, these enigmatic petroglyphs were attributed to the Aztecs, the Comanche, and the Chichimec. But by the 18th century, there was no trace of these groups in the area.
Carbon dating on adobe ovens at the site revealed that settlement they belong to could date to as far back as 8900 BC, making the artwork much older than earlier thought. The artists remain unknown, although most archaeologists believe the Coahuilteco of southwest Texas and northeast Mexico were the creators.
Know Before You Go
Take Highway No. 53 through Mina until you find a sign for the Boca de Petrerillos. Continue West on the dirt road for around 2 miles. The site is open from 10:00 a.m to 7:00 p.m, Sunday to Thursday. Admission is free.