Pat O'Brien Photo:
Old Faithful Cabin
Pat O'Brien Photo:
Old Faithful Cabin
Pat O'Brien Photo:
Yellowstone Roosevelt Arch [HDR]
Pat O'Brien Photo:
Yellowstone North Gate Sign
Pat O'Brien Photo:
Old Faithful Colors [HDR]
Pat O'Brien Photo:
A Talkative Bison
Pat O'Brien Photo:
Bison Jam
Pat O'Brien Photo:
Mormon Row
Pat O'Brien Photo:
Big Sky, Small Rainbow [HDR]
Pat O'Brien Photo:
The pots of gold at the end of the rainbow
Pat O'Brien Photo:
Milky Way over Yellowstone
Pat O'Brien Photo:
Yellowstone Thermals [HDR]
Pat O'Brien Photo:
West Thumb Geyser Basin
Pat O'Brien Photo:
Grand Tetons Cabin
Pat O'Brien Photo:
Old Faithful Sun Rays
Pat O'Brien Photo:
Grand Tetons HDR
Pat O'Brien Photo:
Yellowstone Falls