They may lurk around several nondescript corners in a nondescript office building. They may be hidden behind an unlabeled door. They may be dark when you enter them, though hopefully lights will come on as you ascend.
I once worked on the third floor of a 100-plus-year-old university building. It had a staircase to die for, broad, shallow, perfectly calibrated to the human footstep, with a curved wooden banister. I felt noble just ascending those stairs. They were the main show. There may have been an elevator somewhere, but it took a back seat.
I know it's not practical, but what if every two- or three- or four-story building was retrofitted with such a grand staircase? What if elevators were harder to find. Wouldn't we all be better off?