[Tragedy in the Valley Jaworowa: incredible coincidence or perfect murder?]

The paper presents the case of an unexplained and the most mysterious death in the history of Polish Tatra tourism. It concerns three people of different ages and occurred on August 3, 1925 in the Valley of Jaworowa. Kazimierz Kasznica, his son Waclaw Kasznica and a newly discovered mountaineer Ryszard Wasserberger died suddenly for unknown reasons in 15 minutes during a mountain trek. This story is interesting due to the mysterious, simultaneous death of three people of different ages and due to the fact that Waleria Kasznica - the wife of Kazimierz and the mother of Waclaw Kasznica survived the journey. KEY WORDS.