1112-6136 - Echinus Spring in the Norris Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America
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
970-607 - Common Sea Urchin (Echinus esculentus), view showing colourful shell , spines and tube feet extended on indistinct background, St Abbs, Scotland, UK
29-459 - Echinus Geyser, erupts every hour in Norris Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America (U.S.A.), North America