Tourists on boardwalk over the mineral runoff from Grand Prismatic Spring, Midway Geyser Basin, Yellowstone National Park, UNESCO World Heritage Site, Wyoming, United States of America, North America

adult boardwalk brother child childhood color image day environment family grand prismatic spring hot spring midway geyser midway geyser basin mineral runoff mother national park nature north america outdoors path people photography remote son three people tourist tourist attraction tourists travel travel destinations unesco world heritage site united states vertical walking woman wyoming yellowstone yellowstone national park america american americas color colour daytime female isolation outside park person promenade relation relative seclusion sightseeing stepping three tourism us usa united states of america us usa walk walkway water wy