They had dreadful injuries, such as broken bones and brain damage, but no external wounds at all. Others believe that the students were killed by aliens because bright lights were spotted in the sky around the time of the disappearance. No one really knows, and such cases remain some of the strangest vanishings there are. During the mid-20th century, when Westerns were especially popular, the tale of the Lost Dutchman's Mine was a popular motif. It was also on the beer koozie he was holding. . Weather is believed to have hampered the search. But they're even better known for something else: the legendary Lost Dutchman's Mine, a much-ballyhooed secret stash of wealth sought by daring adventurers known as "Dutch hunters." The autopsy was inconclusive with no trauma or drugs detected and the death was put down to "natural causes". 10 Mysterious Deaths and Disappearances That Still Puzzle Historians How do you find a treasure? The high country of southern Australia is remote and beautiful and unpredictable, a place where visitors can be swallowed up without a sound. Multiple of the worlds best cave divers aided in the search, but nothing was found. A 6-mile stretch of the river where Alfred had vanished was searched and dredged for 5 full days without turning up any sign of the boy, and when bloodhounds were brought in they oddly tracked his scent to around 500 feet uphill from where his parents had been when he had disappeared, which was odd considering he had supposedly gone missing as he was walking behind them. Campers and hikers say the Button Man appears out of the woods without a sound. The various stones have been named the Trail Maps, the Priest Map, the Horse Map (featuring a horse drawn with a disturbingly succulent butt), the Stone Crosses, and the Heart Map. He offered to join them and the two walked along surrounded by the peaceful serenity of the area before Gerald got tired and sat down to take a breather.