Gardyloo

I guess it depends on your definition of fun. I know that sounds snarky, but the drive isn't really all that fun - mainly flat, and mainly with forest on both sides of the road. Plus, Talkeetna is rather inundated in the summer with people en route to/from Denali, many for sightseeing, and it's on the cruise tour circuit.

If you have two (full) days and don't want to fly, I'd consider driving to Valdez and back, or at least to Glennallen or Copper Center, in order to see Thompson Pass and the Worthington Glacier along the Richardson Hwy. Map - https://goo.gl/maps/qQpFU1m35mH2 . For my money, the views from the Thompson Pass area are the best road views in the state. You could stop at the Matanuska Glacier along the way.



For a day trip north from Anchorage, it's hard to beat Hatcher Pass and the Independence Mine. It's historic and quite beautiful, and makes for a terrific outing. Stop at the Native village of Eklutna coming or going, for a visit to the village's Historical Park, with the brightly painted "spirit houses" in the cemetery next to the old Russian churches. Map - https://goo.gl/maps/RPdRo7ommdU2