As a fellow American, where should I travel for a few days?

I'm about to have a little over week between jobs, and I just want to get out of town for a few days, maybe like 3-5. My family accidentally stocked up a silly amount of air miles, so flying anywhere is pretty doable. I'll be traveling alone, and just looking to relax and maybe experience some cool things I can't at home, I currently live in Montana.