"Castle Geyser has a unique, large, tall geyserite cone structure that may be reminiscent of a castle. This large structure is possibly due to trees growing in the area years prior that became coated in sinter and allowed the height to build up. Layers of geyserite cascade in step-like terraces from the geyser vent and continues to cover the surrounding area. Due to this amount of fragile sinter and the height of the cone, the water is inaccessible for scientific measurements. The western side of Castle Geyser appears smoother than the sinter steps on the east side.

On the road to the summit of Dunraven Pass, just before reaching Tower Falls is the Calcite Springs view area from which can be seen the steaming Calcite Springs along the winding Yellowstone River. There's also a paved nature trail offering other views of the river and steep cliffs between which it flows. Early morning and late afternoon offer the best light for photography as well as few crowds.

The landscape between Tower and Lamar Valley is jaw-dropping in its beauty and ruggedness. All along the way, you might also see large and small herds of bison grazing and sunning themselves.

In addition to vast landscape vistas, Hayden Valley is another location for wildlife watching in Yellowstone National Park. "Bison live year-round in the Hayden Valley. Winters are often severe, with deep snows and temperatures reaching -44 degrees F (-42 degrees C)."