I used to live about an hour and a half from the Appalachians in North Carolina. This meant after a stressful work week that I could hop in the car, and go get lost in them... drive the Blue Ridge Parkway, go eat in Asheville, climb waterfalls, etc. It's one of the few things I miss about the Carolinas!
Sorry you have post vacation blues. I haven't been on an actual vacation since 2009... I just wish I were able to have post vacation blues!
