| Old Faithful Geyser, erupting at Yellowstone National Park, is famous for it's regular, one-hour eruption cycle. |
| Old Faithful Geyser Basin |
| Yellowstone Lake lies at the heart of Yellowstone, surrounded by forests and mountain peaks. |
| The Firehole River passes through forests and verdant grass along the Star Geyser Trail. |
| A buffalo headed southbound on U. S. Highway 89. |
| Elk grazing along the Madison River |
| Mount Haynes |
| White Dome Geyser |
| Fountain Paint Pots |
| Boiling water from excelsior Geyser pours into the Firehole River. |
| Grand Prismatic Spring |
| Lily pads cover Isa Lake, perched at a summit of the mountains along Grand Loop Road. |
| Castle Geyser |
| The White Peaks rise in the background behind the Madison River |
| Gibbon Falls |
| Artist's Paint Pot |
| Steam rises from Beryl Spring, one of many hot springs along Grand Loop Road in Yellowstone. |
| The Red Mountainsare seen in the distance from the shore of West Thumb. |
| Yellowstone's Natural Bridge is a narrow formation of volcanic rock. |
| Evergreen forests line the Madison River as it flows out of Yellowstone National Park into the Madison Valley. The Henry's Lake Mountains are in the distance. |
