Chiquihuite Cave

Chiquihuite Cave is a possible Upper Paleolithic archaeological site in the Astillero Mountains, Zacatecas State, in North-Central Mexico. Chiquihuite Cave may be evidence of early human presence in the Western Hemisphere up to 33,000 years ago. It is located 2,740 meters (9000 feet) above sea level and about 1 kilometer higher than the valley below. Stones discovered here, thought to be lithic artifacts, have been dated to 26,000 years ago based on more than 50 samples of animal bone and charcoal found in association with these stones. However, there is scholarly debate over whether the stones are truly artifacts, human-made tools that are evidence of human presence, or if they were formed naturally. No evidence of human DNA or hearths have been unearthed.

Cave data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).