geyser, Yellowstone National Park, WY, Wyoming, People watching Castle Geyser in Upper Geyser Basin in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, WY, geyser, Old Faithful, Wyoming, A crowd of people watching Old Faithful erupt in Yellowstone Nat'l Park in Wyoming.

Old Faithful, Yellowstone National Park, WY, geyser, Wyoming, A crowd of people watching Old Faithful erupt in Yellowstone Nat'l Park in Wyoming.

hot springs, geysers, Yellowstone National Park, WY, Wyoming, People walking on boardwalks in Upper Geyser Basin in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, Old Faithful, WY, geyser, Wyoming, A crowd of people watching Old Faithful erupt in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, WY, Old Faithful, geyser, Wyoming, People watching Old Faithful erupt in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, hot springs, geysers, WY, Wyoming, Grotto Geyser in Upper Geyser Basin in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, hot springs, geysers, WY, Wyoming, Beauty Pool in Upper Geyser Basin in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, hot springs, geysers, WY, Wyoming, Beauty Pool in Upper Geyser Basin in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, hot springs, geysers, WY, Wyoming, Morning Glory Pool in Upper Geyser Basin in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, hot springs, geysers, WY, Wyoming, Morning Glory Pool in Upper Geyser Basin in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, WY, Wyoming, People walking on the boardwalk next to Fishing Cone on Yellowstone Lake at West Thumb Geyser Basin in Yellowstone Nat'l Park in Wyoming.

Yellowstone National Park, WY, Wyoming, Crowd of people watching Beehive Geyser, Upper Geyser Basin