Myself and two friends are planning a road trip from Detroit, MI to San Francisco, CA. We plan to leave Detroit on August 17th 2009, and would like to arrive in San Francisco on August 21st. I'm looking for the most scenic route out to the west. Speed is not the highest priority, I would like to take this time to explore that big middle section of the country with my two friends. If anyone has any suggestions, or "must see" places, I would love the info.