S: (n) Yellowstone National Park (the first national park in the United States; located in the border area between Wyoming and Montana and Idaho; spectacular wilderness; famous for Old Faithful geyser and for buffalo and bears)
S: (n) Snake, Snake River (a tributary of the Columbia River that rises in Wyoming and flows westward; discovered in 1805 by the Lewis and Clark Expedition)
S: (n) instinct, inherent aptitude (inborn pattern of behavior often responsive to specific stimuli) "the spawning instinct in salmon"; "altruistic instincts in social animals"
S: (n) ability, power (possession of the qualities (especially mental qualities) required to do something or get something done) "danger heightened his powers of discrimination"