My personal experience/preference is merely that a "change of scenery" is a highly favorable perk. I have a private office with a window, and after struggling against code for long enough it is so nice to turn my gaze outside and watch the dog park next door.
But I say scenery change, because one of my favorite things about my job is that I work off site frequently at industrial plants, agricultural facilities and the like. Its like a moderate vacation to just be away from a desk, even though my laptop is attached to me the entire time. Working in a dingy concrete bunker can be as much of a perk as it is to look out my window.
Mostly just monotonous environments tend to be what bothers me most I think. My last job was at a business attached to a mall (you could walk out the doors into the mall food court on the second level). Coffee breaks were often just walking around the downtown core or through the attached public buildings over walkways. Changing your environment is such a massive thing for me to help the day/week/month/years not feel like one long slog