badlands national park in south dakota, boardwalk

approaching badland badlands black boardwalk buffalo canyon canyons city cloud clouds cumulonimbus cumulus custer dakota dakotas design desolate detail geologic geology grasslands gravel grunge highway hills historic history hole holes image monochrome mount mountain national park part path pathway prairie rain rapid remote ridge ridges road roadside roadtrip roadway round rushmore skies sky south stone storm stormy surround symbol terrain trail wall winding