Looking for some unique ideas

I am limited by a significant back injury in the amount/type of exercise that I can do easily/safely without ending up in severe pain. Walking is currently my main form of exercise. I am looking for some unique/different ways that I can incorporate more walking into my daily routine. Any ideas are very much appreciated! If you have any other tips, ideas, or suggestions for me that don't involve walking, I'd appreciate hearing those as well. Thank you in advance.