Stone formations at Chiricahua National Monument in southeastern Arizona, on Nov. 18, 2001. Chiricahua — known for its towering rock spires, Apache heritage and rich biodiversity — was made the United States’ 64th national park on Oct. 20, 2026. (Monica Almeida/The New York Times) By RYLEY OBER America has a new national park. A bill signed Tuesday by President Donald Trump turned Chiricahua National Monument — known for its towering rock spires, Apache heritage and rich biodiversity — into…