How it works: First, map out your route (it could be a path you typically use for jogging or walking), and then list 5-10 bodyweight exercises (pushups, burpees, squat jumps, etc). Next to each move, write down a landmark you’ll see along your path (park bench, red light, etc).
To start your scavenger hunt, head out on your route and every time you see one of your landmarks, do 10 reps of the corresponding move. For example, if you listed “park bench” next to pushups, hit the bench for a set of 10 incline or decline pushups every time you see one.
Source: http://www.shape.com/fitness/workouts/10-new-outdoor-workout-ideas?page=4