Yellow bacteria and algae in a hot spring at Black Sand Basin and Biscuit Basin, Yellowstone National Park, Wyoming, USA, North America

algae alga american america aquatic macrophyte aquatic plants aquatic plant bacteria bacteria bacterium biscuit basin black sand basin deserted empty famous place geothermal areas geothermal area geothermal field geothermal power geothermal spring geothermal geothermic energy geothermic germs high temperature area hot spring hot hydrophyte hydrophytic plant mineral deposits mineral deposit minerals mineral np national parks national park usa national park natural preserve nature conservation area nature reserves nature reserve nature nobody no one no people north america np place of interest plants plant rocks rock sedimentation sediments sediment sights sight source springs spring thermal area thermal springs thermal spring thermal zone tourist attractions tourist attraction uninhabited united states of america united states us american us america usa water plant waters water wyoming yellowstone national park yellow