Another Boulder drive would be the road up to the top of Flagstaff Mountain which is one of the mountains just to the west of Boulder, you can get some spectacular views from there...just follow Baseline Road west til it ends at the top of the mountain...

There is also an art museum on the CU campus, in the Sibell Wolle Fine Arts building...although I go to CU, Im not really an artsy person so Ive never been in it, but since you guys said you were into art, that may be up your alley...