There are many different ways to explore Northern Arizona, from a self-guided tour to a group adventure.
A Grand Canyon tour should definitely be on your list. For the adventurous, there are whitewater rafting tours on the Colorado River or various hikes sponsored by the National Park Service. If you prefer a more relaxing way to view the canyon, there are airplane and helicopter tours, or a scenic train ride to the canyon. Other nature hikes/adventures are available at the various National and State Parks throughout the area.