I have a business trip to Denver in a few weeks, but I'm planning on staying a couple extra nights in order to see the city. My SO is also coming along. Neither of us have been to Denver -- any favorite things to do/see/eat?

• We both enjoy art museums.
• I've heard good things about Wings Over The Rockies, but I'm not sure how it compares to other aviation museums across the country.
• Food: We are both kind of foodies, but it doesn't have to be fancy. Any cuisines to look for, or unique places to go?
• Natural things: We might visit Rocky Mountain National Park or something like that. We have a rental car and don't mind driving if the destination is worth it.

Ok, so the "Going on a trip and have zero idea what to do as a non-tourist..." isn't entirely true like it was in my post about NYC last year, but everyone was extremely helpful and threw out suggestions I wouldn't have even thought about looking for. So here I am again to bug you wonderful people for Tildes Travel Guide 2: Electric Denver Boogaloo

Same as before, staying for a week, I do have a rental car this time (trying to decide between the comfort of a Lexus or sportiness of an Alfa Romeo, damn car guy indecisiveness) so transport is less of an issue, anything that you'd suggest to see/do?