Yel ‧ low ‧ stone Na ‧ tion ‧ al Park, the /ˌjeləʊstəʊn ˌnæʃ ə nəl ˈpɑːk $ -ˈpɑːrk/ BrE AmE
a large national park mostly in Wyoming, in the northwestern US, known for its hot springs and ↑ geyser s (=natural springs of hot water that rise suddenly into the air) , especially one called ↑ Old Faithful which many tourists come to see