I'm going on a massive Road Trip (starting from Texas) & am thinking about hitting Yellowstone, Mt. Rushmore, Las Vegas, the Arches National Park, Mesa Verde NP, Bryce Canyon/Zion, Los Angeles, San Francisco, Yosemite NP, Mt. Rainer, Seattle, Glacier NP...traveling in a large clockwise loop. What thing do you recommend at these places? Especially would like to know about lesser known areas & hidden gems. Many thanks!
Thanks to Rock's suggestions, I'll be adding in the Grand Canyon & the Grand Tetons (which means adding another 4 days to this lengthy trip :>)