Grand Prismatic Spring and Excelsior Pool behind, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

adult algae color image crater day environment excelsior pool grand prismatic spring heat horizontal hot spring medium group of people midway geyser midway geyser basin national park nature north america outdoors people photography remote rock steaming tourist tourist attraction travel travel destinations unesco world heritage site united states wyoming yellowstone yellowstone national park america american americas color colour daytime hot isolation outside park seclusion sightseeing steam stone tourism us usa united states of america us usa volcanic water wy