Comment by MiDu16

"a walk with just your thoughts" can lead you to many places include good and bad places. A mediative walk is to focus on nothing else but your body including your breath, your arms, your steps, the sensation of skins, the smell you breath in and out, the sound you hear. You don't need to focus on all of these at once but you can just pick one and focus on it for a period ideally as long as possible, but you can switch between them at the start. All of these is very difficult but not impossible if you do in a crowded city when everything changes very fast and you're exposed to many things that you tend to like or dislike. Of course, if you're a zen master, you can meditate everywhere but personally I feel I'm very far from it. The fact that I struggle to focus even in quiet places tells a lot about how much I need to practice.