Black Opal Spring, geyser, Biscuit Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

america american area areas basin biscuit black blue bodies body conservation countryside day daylight daytime during energy exterior exteriors famous geologic geological geologically geology geothermal geothermic geyser geyser geysers hot hot spring hot springs known landscape landscapes national national natural nature nobody north of opal outdoor park park parks photo photos power preserve preserves renowned reserve reserves sanctuaries sanctuary scenery scenic seeing shot shots sight sights source sources spring spring springs states the thermal turquoise united upper us us american usa water waters well well known wells wildlife worth wyoming yellowstone