A Frame within the Frame
Doorways and nearer buildings can readily provide this frame and in the natural world trees, branches and rocky overhangs typically work well. Even shooting through the gap between the legs of a much nearer animal might prove effective.
Take time to select your internal frame well so that it matches and complements the subject matter. The frame itself then becomes an additional component in the narrative and not just something you’ve added for the sake of it.
Choice of focal length and your position will clearly affect the spatial relationship of the subject matter within the frame and small adjustments can make a big difference to the impact.