One of the many wonders of Wyoming is a spring off the beaten path near Afton that kind of "breathes" off and on every hour of every day. It's called the Periodic Intermittent Spring and there's new drone video that shows why this geological feature is such a wonder.
If you've never heard of Wyoming's cutter races, this is basically our version of chariot races. There's a vintage movie that shows some old-school cutter races in Wyoming dating back to the mid-1950's.
If spend any amount of time in the mountains of Wyoming, you always need to be aware of avalanche danger. Two Wyoming snowmobile riders learned that recently as they narrowly escaped an avalanche that caught them by surprise.