These shocking mysteries may never be solved. For this list, we’re looking at the most unsettling unsolved mysteries and unexplained events from around the world. Our countdown includes Malaysia Airlines Flight 370, Siberian Sinkholes, Havana Syndrome, The Disappearance of Madeleine McCann, Void in the Pyramid of Khufu, and more! What do YOU think is the creepiest mystery of the century so far?
