832-302570 - Layers with thermophilic bacteria, Upper Geyser Basin, Yellowstone Nationalpark, Wyoming, USA, United States of America

832-123950 - Palette Spring Street, Lower Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, America

832-110184 - Palette Spring Terrace, Lower Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces, Yellowstone National Park, Wyoming, United States of America, USA

832-123920 - Opalescent Pool, geyser, drainage area with coloured thermophilic bacteria, microorganisms, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

832-124005 - Outlet of the Pinwheel Geyser, Porcelain Basin, Norris Geyser Basin, colored thermophilic bacteria, microorganisms, geysers, geothermal springs in Yellowstone National Park, Wyoming, United States of America, USA

832-123993 - Tourists on boardwalk, Grand Prismatic Spring, Midway Geyser Basin, colored thermophilic bacteria, microorganisms, hot springs, Yellowstone National Park, Wyoming, United States of America, USA

832-123949 - Orange Mound Road, Upper Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, America

832-123994 - Petrified tree, runoff area of the Grand Prismatic Spring, Midway Geyser Basin, colored thermophilic bacteria, microorganisms, hot springs, Yellowstone National Park, Wyoming, United States of America, USA

832-123921 - Coloured thermophilic bacteria, the outlet of Cliff Geyser, Fire Hole River, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

832-123952 - Orange Mound Road, Upper Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, America

832-123918 - Punch Bowl Spring, geyser, drainage area, coloured thermophilic bacteria, microorganisms, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

832-123967 - Drainage area of New Blue Spring Terrace, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, United States of America, USA

832-123961 - Effluent area of the Canary Spring Terrace, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, Mammoth Hot Springs Terraces in Yellowstone National Park, Idaho, Montana, Wyoming, America

832-123969 - Canary Spring Terrace, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, United States of America, USA

832-123963 - Canary Spring Terrace, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, United States of America, USA

832-123973 - Palette Spring Terrace, Lower Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, United States of America, USA

832-123971 - Devil's Thumb, Palette Spring Street, Lower Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, petrified trees, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, United States of Am

832-123947 - Palette Spring Street, Lower Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, America

832-124033 - Palette Spring Street, Lower Terraces, limestone sinter terraces, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces, Yellowstone National Park, Wyoming, United States of America, USA

832-123960 - Effluent area of the Canary Spring Terrace, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, Mammoth Hot Springs Terraces in Yellowstone National Park, Idaho, Montana, Wyoming, America

832-123975 - Palette Spring Terrace, Lower Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, United States of America, USA

832-123992 - Runoff from Excelsior Geyser into Firehole River, Midway Geyser Basin, colored thermophilic bacteria, microorganisms, geysers, hot springs, Yellowstone National Park, Wyoming, United States of America, USA

832-123919 - Punch Bowl Spring, geyser, drainage area, coloured thermophilic bacteria, microorganisms, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

832-123948 - Orange Mound Road, Upper Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, America

832-123989 - Tourists on boardwalk, Grand Prismatic Spring, Midway Geyser Basin, colored thermophilic bacteria, microorganisms, hot springs, Yellowstone National Park, Wyoming, United States of America, USA

832-123972 - Devil's Thumb, Palette Spring Street, Lower Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, petrified trees, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, United States of Am

832-123929 - Sunset Lake, geyser, drainage area with a boardwalk, coloured thermophilic bacteria, microorganisms, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

832-124058 - Emerald Pool Geyser, drainage area, colored thermophilic bacteria, microorganisms, geothermal sources, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

832-123951 - Orange Mound Road, Upper Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, America

832-123930 - Sunset Lake, geyser, drainage area, coloured thermophilic bacteria, microorganisms, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

832-123968 - Drainage area of New Blue Spring Terrace, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, United States of America, USA

832-123928 - Emerald Pool, geyser, drainage area with a boardwalk, coloured thermophilic bacteria, microorganisms, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

832-123970 - Devil's Thumb, Palette Spring Street, Lower Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, petrified trees, Mammoth Hot Springs Terraces in Yellowstone National Park, Wyoming, United States of Am

832-123991 - Runoff from Excelsior Geyser into Firehole River, Midway Geyser Basin, colored thermophilic bacteria, microorganisms, geysers, hot springs, Yellowstone National Park, Wyoming, United States of America, USA

832-123926 - Emerald Pool, geyser, drainage area with a boardwalk, coloured thermophilic bacteria, microorganisms, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

832-124000 - Echinus Geyser with the world's highest acidity, Back Basin, Norris Geyser Basin, geysers, colored thermophilic bacteria, microorganisms, geothermal springs in Yellowstone National Park, Wyoming, United States of America, USA

832-124034 - Angel Terrace, Upper Terraces, limestone sinter terraces, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces, Yellowstone National Park, Wyoming, United States of America, USA

832-123927 - Emerald Pool, geyser, drainage area with a boardwalk, coloured thermophilic bacteria, microorganisms, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

832-124006 - Outlet of the Pinwheel Geyser, Porcelain Basin, Norris Geyser Basin, colored thermophilic bacteria, microorganisms, geysers, geothermal springs in Yellowstone National Park, Wyoming, United States of America, USA

832-123923 - Drainage area of the Sapphire Pool, geyser, coloured thermophilic bacteria, microorganisms, Biscuit Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

832-110164 - Colored thermophilic bacteria, outlet of the Cliff Geyser, Firehole River, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

832-110161 - Emerald Pool, geyser, outlet area, colourful thermophilic bacteria, microorganisms, boardwalk, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

832-110171 - Palette Spring Terrace, Lower Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces, Yellowstone National Park, Wyoming, United States of America, USA

832-110169 - Orange Mound Terrace, Upper Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces, Yellowstone National Park, Wyoming, United States of America, USA

832-110193 - Palette Spring Terrace, Lower Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, Mammoth Hot Springs Terraces, Yellowstone National Park, Wyoming, United States of America, USA

832-110194 - Palette Spring Terrace, Lower Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, Mammoth Hot Springs Terraces, Yellowstone National Park, Wyoming, United States of America, USA

832-110181 - Palette Spring Terrace, Lower Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces, Yellowstone National Park, Wyoming, United States of America, USA

832-110185 - Palette Spring Terrace, Lower Terraces, limestone sinter terraces, geysers, hot springs, colorful thermophilic bacteria, microorganisms, dead trees, Mammoth Hot Springs Terraces, Yellowstone National Park, Wyoming, United States of America, USA

832-42376 - Palette Spring Terrace, Lower Terraces, limestone sinter terraces, geysers, hot springs, colourful thermophilic bacteria, Mammoth Hot Springs Terraces, Yellowstone National Park, Wyoming, United States of America

832-42379 - Outlet of the Excelsior Geyser in Firehole River, Midway Geyser Basin, colourful thermophilic bacteria, microorganisms, geysers, hot springs, Yellowstone National Park, Wyoming, United States of America, USA

817-400645 - Thermophilic Algae in Grand Prismatic Spring, Midway Geyser Basin,Yellowstone National Park, Wyoming, USA

817-400656 - Unnamed Spring, Upper Geyser Basin,Yellowstone National Park, Wyoming, USA

832-18480 - Outlet with colourful thermophilic bacteria and algae of the Sapphire Pool in Bisquit Basin, Yellowstone National Park, Wyoming, Idaho, Montana, America, United States

817-124016 - Sunset Lake with colourful algae and bacterial colonies, Black Sand Geyser Basin

698-2302 - Eruption of Castle Geyser with thermophilic bacterica mats in foreground, Upper Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America