Historical Images & Videos on Instagram: "Inside caves, darkness hides dangers the eyes cannot see. Many explorers say that when they take their first steps inside, the silence and still air feel harmless. But that’s when the smallest detail can decide between life and death. In countless stories, adventurers who ignored this test watched their torch flames suddenly vanish, as if something invisible had stolen the air. What seemed like nothing more than mysterious darkness became a deadly trap:

7 Unsolved Historical Mysteries That Still Baffle Experts