Greg Vaughn:
Yellowstone geothermal pool
Greg Vaughn:
Yellowstone in winter
Greg Vaughn:
Mounded Snow
Greg Vaughn:
Old Faithful
Greg Vaughn:
Yellowstone Winter
Greg Vaughn:
Bison in Winter
Greg Vaughn:
Cottonwoods, Lamar Valley
Greg Vaughn:
One-flower Helianthella
Greg Vaughn:
Autumn Cottonwoods
Greg Vaughn:
Bison on the move
Greg Vaughn:
Grand Prismatic Spring
Greg Vaughn:
Grassy Spring
Greg Vaughn:
Undine Falls
Greg Vaughn:
Lamar Valley Cottonwood
Greg Vaughn:
Looking for Mama
Greg Vaughn:
Hayden Valley
Greg Vaughn:
Cottonwoods in Winter