The Olmec people were the original inhabitants of Guatemala, and lived there approximately 2500 years ago, remaining until around the year 1400. They made a lot of temples and tombs, but never anything else that looked like this giant head.
Something- or someone - must have impressed them a great deal in order for the one-off sculpture to be made. Confusingly, the head appears to have Caucasian features. No Caucasians we're aware of had ever visited Guatemala by the time the statue was made.