Grand Teton National Park
Mountain vistas, wildlife, and big sky. I found Grand Teton to be a location that favors the morning shoot. The Moulton Barn (on Mormon row); Schwabalcher's Landing; Oxbow Bed; the Snake River are among the easily recognizable shots.
Yellowstone National Park
A stone's throw from Grand Teton NP, Yellowstone is known for the thermal features and wildlife (please respect the animals, both for their safety and yours).