That's one thing that I miss from my able-bodied life, contemplative walks. Rolling a wheelchair around and dealing with the intrinsic difficulties associated with doing so really destroys any kind of meditative quality out of the experience.
Now my deep meditative thoughts come to me in the shower, but it still doesn't hold a candle to a stroll through town during a brisk winter in fair weather.
Apologies for bringing down the mood, but I feel better.