Choose a small set of 2 or 3 open variables and play with ideas for a walk that activates those variables. You might activate them in counterpoint or conjunction, in alternation or simultaneous layering.
For the thought experiment, write a brief synopsis of the walk.
For more, think up a totally different way to put those two variables in play, and write a synopsis of that walk.
This could be a warmup exercise, just a way to get in touch with a wide range of possibilities.
But if one of those overviews appeals, try scripting the walk.