Thanks for these pics, 1st time I see Mount Rushmore on these forum, I'd like more US National Parks.
I visited the Ravin de Corboeuf this summer (I posted some pics:
here) and this area reminded me some photos I've seen on a NP but I didn't remember which one, I searched the internet with no result, I was beginning to think that I

... so it was the Badlands!!!

thank you very much for posting this thread!