Replying to What to do in Denver/CO

So I'm going to see M83 at Red Rocks next tuesday and I'm driving down on Friday for a few days of being a tourist.

What are some must see places that I should go to while there?

Tentatively on my list are checking out Rocky Mountain National Park one day, Garden of the Gods and Pikes Peak another, walking downtown Denver.

Idk, I've only been to the airport. So I'm at a loss for knowing the really cool stuff.

+k for help and suggestions

Thanks!