kepler cascades a waterfall on the firehole river in southwestern yellowstone national park wyoming usa wpa poster art

administration america area art arts artwork canyon cascades conservation deal design federal firehole flat flora forest forestland formation graphic illustration kepler lake landscape meadow monument mountain national natural nature new nostalgia park poster print printing program project protected range remote retro revivalism river rock scenery screen silk southwestern states style throwback united usa vector vintage visual waterfall wilderness works wpa wyoming yellowstone