What I most remember from any traveling I've done is the weather I experienced.
Just outside of Mount Rushmore in the Black Hills of South Dakota, I experienced a storm that holds a special place in my memory. I remember losing all ability to judge scale as I looked over the vast expanse of forested hills, as vast darkening storm clouds developed above. A sudden, brief hailstorm left me scrambling for the car and resulted in several inches of penny sized hailstones on the ground.
So far from the central plains, I felt right at home.