Old Faithful, Upper Geyser Basin, Yellowstone NP
Old Faithful, Upper Geyser Basin, Yellowstone NP
Old Faithful, Upper Geyser Basin, Yellowstone NP
Old Faithful, Upper Geyser Basin, Yellowstone NP
Tourists viewing an eruption of Old Faithfull, Yellowstone NP
Blue Star Spring, Upper Geyser Basin, Yellowstone
Chinese Spring, Upper Geyser Basin, Yellowstone NP
Heart Spring, Upper Geyser Basin, Yellowstone NP
Lion Geyser in rain, Upper Geyser Basin, Yellowstone NP
Spasmodic Geyser, Upper Geyser Basin, Yellowstone NP
Grand Geyser, Upper Geyser Basin, Yellowstone NP
Grand Geyser, Upper Geyser Basin, Yellowstone NP
Beauty Pool, Upper Geyser Basin, Yellowstone NP
Chromatic Pool & run-off, Upper Geyser Basin, Yellowstone NP
Chromatic Pool, Upper Geyser Basin, Yellowstone NP
Grotto Geyser, Upper Geyser Basin, Yellowstone NP
Grotto Geyser, Upper Geyser Basin, Yellowstone NP
Morning Glory Pool, Upper Geyser Basin, Yellowstone NP
Daisy Geyser, Upper Geyser Basin, Yellowstone NP
Trees, Upper Geyser Basin, Yellowstone NP
Sawmill Geyser, Upper Geyser Basin, Yellowstone NP
Firehole River, Upper Geyser Basin, Yellowstone NP
Crested Pool, Upper Geyser Basin, Yellowstone NP
Crested Pool, Upper Geyser Basin, Yellowstone NP
Castle Geyser, Upper Geyser Basin, Yellowstone NP
Castle Geyser, Upper Geyser Basin, Yellowstone NP
Castle Geyser, Upper Geyser Basin, Yellowstone NP
Castle Geyser, Upper Geyser Basin, Yellowstone NP
Castle Geyser, Upper Geyser Basin, Yellowstone NP
Old Faithfull erupting at dusk, Yellowstone NP
