mammoth hot springs with steamy terraces during winter snowy season in yellowstone national park, wyoming

active america boiling calcium caldera canyon carbonate colorful environment formations geology geothermal geyser hot landscape limestone mammoth mineral national natural nature orange palette park pool rock rocks scenery scenic season snowy spring springs states steamy sulfur supervolcano terrace terraces thermal tourism travel travertine united usa valley volcanic volcano water white wildlife winter wyoming yellowstone