This week we are talking about Jane, Arnna, and Grant Beaumont, three siblings who disappeared without a trace from Glenelg Beach near Adelaide, Australia, on January 26, 1966. The case remains one of Australia's most infamous unsolved mysteries, with numerous theories and investigations over the years yielding no conclusive answers. Despite extensive efforts by law enforcement and the community, the fate of the Beaumont Children remains unknown, making their disappearance one of the most haunting cold cases in Australian history.