Pictograph Cave, a Montana State Park near Billings, home to three caves. It's the site of state's first professional archeological studies where 2000 year old paintings Native Americans can be view.
Black Hills, Keystone, SD, États-Unis - 31 mai 2008 : Custer State Park. Ceinture de falaises rocheuses rouges derrière la prairie avec des arbres sous le ciel bleu.