From my road trip through the Rockies last year.
On our way from Black Hills to Glacier NP, we stopped at a place called White Sulfur Springs, in the middle of Montana. The day after, we drove north on Hwy 89, which was a beautiful stretch of road, especially with the weather threatening rain (no rain hit us, but the sky made for great lighting and backdrop). One of my favorite unplanned moments on that trip.