yellowstone national park with opal spring at midway geyser basin, wyoming, usa

yellowstone environment geothermal travertine beautiful geyserite brilliant colourful excelsior landscape undefined national contrast american colorful deposits outdoors turquois volcanic wyoming america colours flowing natural outdoor plateau springs western spring midway geyser create orange colour forest nature rising runoff states thrive travel united waters basin water white algae azure clear color north rocks steam park opal blue deep hill pool west usa ice