Last week, on my way from meeting with the folks at Grand Canyon Association and heading to Window Rock, I stopped at the Yavapai Museum in Grand Canyon National Park. Despite the controversy of recent years about selling an anti-science book in the park's store, the Park Service exhibits on the geology of the canyon are based on solid science.
The displays take you step-by-step through the entire geologic history of the canyon region. The museum sits on the canyon rim and is fairly unassuming. I was pleasantly surprised by the breadth and quality of the exhibits.