This is the point where highway 34/73 crosses the Cheyenne River in west central South Dakota. This is a roller coaster road on a giant scale. What is most fascinating about the geography here is that these days the Cheyenne River is a mere trickle compared to the huge torrent it was millions of years ago, when it carved out this immense valley.
Take a minute to look at this post from a while back (click here) and then consider the three biggest differences. And one similarity. Discuss.
One similarity that I can see is that they were both taken through the window of a car on an interstate highway. A difference? In one the world is whizzing by at 75 mph and in the other it is hardly moving.
For the record, one was taken in southern California and the other was taken in western South Dakota. And I love both places.