My buddy and I are going to travel to Denver in early June. We have to be in Sacramento the second week in July and back to PA at the end of July. We are hoping to see Yellowstone for a couple days, Grand Canyon for a couple days, and Yosemite for a couple days. We are talking about a day or so in North-Western Mexico. We are going to Crater Lake and Seattle after Sacramento, then to Glacier National Park, Mount Rushmore, Badlands, on the way home. What are some "Don't Miss" things to see that maybe people don't know about. We are a little adventerous, but not too adventurous.
Any ideas would be appreciated. Thanks