In January 1959, a group of young hikers set off on a journey through the Ural Mountains in then-Soviet Russia.
About a month later, all of the hikers were discovered dead and scattered around their campsite in various states of undress. To this day, investigators are not sure how exactly all nine of them perished.
The case has since been called the Dyatlov Pass Incident.
Among the bizarre clues found around their bodies and their campsite, however, were four cameras. These photos of the Dyatlov Pass Incident were developed and used to piece together the events leading up to that fateful night.