4. The Dyatlov Pass Incident (Russia, 1959)
The Dyatlov Pass incident is one of the most unsettling and unsolved mysteries of the 20th century. Nine experienced hikers died under mysterious circumstances while traversing the Ural Mountains in Russia. The group’s tent was found torn open from the inside, and the hikers were found scattered in a state of undress, some with bizarre injuries like fractured skulls and missing eyes.
While theories range from an avalanche to secret military experiments, the truth remains elusive, and the eerie circumstances continue to perplex experts.