South Dakota As You Have Never Seen It
Dakotalapse is a site featuring time-lapse photography videos created by Randy Halverson of Kennebec, S.D. (That is the White River in one series.)
I shot Horizons from April - October 2012 mostly in South Dakota, but also some at Devils Tower in Wyoming. From the rugged Badlands, the White River valley and the Black Hills, the horizons seem to endlessly change.
You can download the videos for a small fee. They are gorgeous.