black growler steam vent at the porcelain basin, norris geyser basin, yellowstone national park, wyoming

algae america american and barren basin beautiful black blue boardwalk colloidal colorful deposits environment forest fumarole geothermal geyser ground growler heritage high hike hiking hills hot lakes landscape ledge mineral national natural nature norris of outdoor outdoors park plateau pool pools porcelain recreation rocks site sky spring springs states steam summer sunday supervolcano travel travertine trees turquois unesco united us usa vent volcanic volcano water west western wild wilderness world wyoming yellowstone