Yellowstone National Park is large, therefore we split tours into Lower and Upper Loops. One day in each Loop gives you a good sense of the ecosystem. The Yellowstone ecosystem consists of bacteria and wildlife which have existed for hundreds of thousands of years. In addition, the geology of the Park also offers a great opportunity of understanding its past. The magma under Yellowstone is a large part of the geological storey and helps to explain the existence of thermophiles.
Apart of larger mammals, there are hundreds of birds, little animals such as squirrels, call Yellowstone home. Moreover, Yellowstone has so much thermal features as well as scenic drives that you will love.
The third day of the tour will be in the Grand Teton National Park. It has similarity with Yellowstone. However, the Tetons had mountains that stand out. We shall understand how these mountains came to be. The tours like in Yellowstone are geared towards wildlife, scenery and history.