The prehispanic history of Chile refers to the period from the first human populations in the territory of Chile until the first European exploration of the region, by Spaniard Diego de Almagro in 1535-36. The prehistoric site of Monte Verde in Chile, presently under consideration as a World Heritage Site by UNESCO, has provided the oldest dates of habitations in Chile at around 13,000 to 15,000 years for "Monte Verde II." Dates of 33,000 to 35,000 years have been suggested for the "Monte Verde I" site but the evidence is considered too meagre to verify that.