Llullaillaco was first climbed by Inkas centuries ago. In 1999, a team of archeologists, led by Johan Reinhard, found three mummies of children on the top of Llullaillaco. At the time of their death they were six, seven, and fifteen years old. They were ostensibly human sacrifices offered to the gods of the Incan pantheon on mountaintops. In 2003 they were at the Catholic University of Salta, but starting from 2007 they can be found at the Museum of High Altitude Archaeology of Argentina.