Hiking and Camping
These kind of go together for me. While I sometimes go hiking without camping, I almost always do some hiking if I'm going camping. I enjoy both of these quite a bit. It's one of the least invasive ways I know of to get out and enjoy nature. I'm a huge believer in minimal impact hiking and camping (i.e. leave no trace). I enjoy both back country camping or camping at a site. Usually the person I go with decides which they'd rather do.
I did a lot of hiking/camping out in Glacier National Park last summer. This year I’ve done a fair amount in various places in Massachusetts and New Hampshire. I’ll talk more about the specifics of the places I go next time I go.