A summer eruption of visitors in Yellowstone encircles the rim of Old Faithful, waiting for the world's most famous geyser to send its hot water plume skyward. Photo courtesy National Park Service%252FNeal Herbert.
A summer eruption of visitors in Yellowstone encircles the rim of Old Faithful, waiting for the world's most famous geyser to send its hot water plume skyward. Photo courtesy National Park Service%252FNeal Herbert.