Ping & Wenji:
Color of the hotspring
Ping & Wenji:
Mammoth Terraces
Ping & Wenji:
Morning Glory Pool
Ping & Wenji:
Castle Geyser
Ping & Wenji:
Old Faithful Geyser
Ping & Wenji:
Grand Prismatic Spring
Ping & Wenji:
Grand Canyon of the Yellowstone
Ping & Wenji:
Grand Canyon of the Yellowstone
Ping & Wenji:
Old Faithful Inn
Ping & Wenji:
Yellowstone Lake
Ping & Wenji:
Bison Closeup
Ping & Wenji:
Fighting Bisons
Ping & Wenji:
Ping and bisons
Ping & Wenji:
Ping and bull elk
Ping & Wenji:
Bull Elk
Ping & Wenji:
Wenji and cow elks
Ping & Wenji:
Wenji and bull elks
Ping & Wenji:
Coyote