There is a great deal to see in Colorado. Here are some of my favorite spots.
Eagles Nest Wilderness north of Silverthorne, Colorado
Ten Mile Canyon between Frisco, Colorado and Copper Mountain Ski Area
Collegiate Peaks between Leadville and Buena Vista, Colorado
Independence Pass SW of Leadville to Aspen, Colorado
Great Sand Dunes NM near Alamosa, Colorado
Wolf Creek Pass east of Pagosa Springs, Colorado
Slumgullan Pass, Cinammon Pass, and Engineer Pass near Lake City Colo. (last two passes will require 4WD that can be rented locally)...Awesome place.
The more scenic areas are those from Independence Pass westward to Lake City, Colo.