When my FT job was downtown, I enjoyed taking in the sites, seeing the area as I hadn't done before. I don't listen to anything so I hear everything around me.
You may use this time to listen to podcasts you're interested in or an audiobook you've been dying to devour. Use your daily walks as time to enjoy listening to something you haven't found time to do in your schedule, and you'll be looking forward to these walks immensely.
Feel free to leave any podcast or audiobook recommendations in the comments below.