Strong architectural lines - pillars, arches, staircases, underpasses, brutalist grids - give you ready-made composition. Use leading lines to draw the eye to your subject. Use symmetry and then break it with a human figure.

Watch for: the architecture overwhelming the human element. You're making a street photograph, not an architectural one. The person needs to matter.

The point: the best street photographers use cities as studios. The city is already designed. Work with it.