Traveling from Idaho to Colorado, my husband and I made a trip to Yellowstone first. We both got to see our first Elk. She came right up to us, ate a little of the greens surrounding us, and went right on her way. It was a wonderful and one of a kind experience. Our favorite hike was to the waterfalls... all of them. There were so many and each waterfall had a unique quality. Separating one from the other.