This is the Maiden of Llullaillaco, an Incredibly Well-Preserved Child Sacrifice from the Incan Empire around 500 years ago.
The Maiden of Llullaillaco, sacrificed at around the age of 15, was discovered with the other "Children of Llullaillaco" which includes a 6 year old girl and a 7 year old boy.
These mummies are so well preserved due to their position within a tomb atop a mountain within the extremely dry Atacama Desert. They are so well preserved, that their internal organs are intact, individual hairs on the arms can be seen and even one of the heart's still contains frozen blood.
The deaths of the three children occurred by drugging the children with alcohol and coca, then placing them in the tomb where they eventually died in their sleep. This appears to have been a very well prepared process, as hair samples dictated that the children had extremely rich diets leading up to their deaths. The tombs were also adorned with elaborate dress and trinkets.
The boy however, faced a different death that could've indicated struggle or a different burial process. The boy was very tightly bound, and had dislocated hips and ribs and it appears he died under stress as the clothing contains both vomit and blood. Suffocation is the likely cause of his death due to the way he was bound.
