Tourists on boardwalk, Grand Prismatic Spring, Midway Geyser Basin, colored thermophilic bacteria, microorganisms, hot springs, Yellowstone National Park, Wyoming, United States of America, USA

america american area areas attraction attractions bacteria basin being beings boardwalk boardwalks colored conservation day daylight daytime dock docks during energy exterior exteriors famous footbridge footbridges geothermal geothermic geyser geyser geysers grand hot hot spring hot springs human humans known microorganisms midway national national natural nature north of on outdoor park park parks people person persons photo photos pier piers power preserve preserves prismatic renowned reserve reserves sanctuaries sanctuary seeing shot shots sight sights site sites source sources spring spring springs states steam steaming the thermal thermophilic tourism tourist touristic touristical touristically tourists tourists touristy united us us american usa well well known wells wildlife wood wooden worth wyoming yellowstone