Apart from their immense natural beauty, perhaps one of the most exhilarating things about the national parks is that they do not treat visitors with kid gloves. With the exception of some guidelines around permits, campsites, and Leave No Trace education, they let travelers explore and play at will, experiencing their wonders largely free from guardrails and supervision. Of course, with this privilege comes a certain amount of danger. Outforia recently submitted a Freedom of Information Act request to the National Park Service to uncover which parks were the most deadly and what the most common causes of death were. It goes without saying that many of these parks were also the most touristed, but the causes of death may seem surprising and warrant a second thought about how to tour safely.
Source: These Are the 5 Deadliest National Parks | Outside Online