This courtyard (at the bottom of a wide air shaft) is hidden in the middle of the apartment building where Mabel Watson Payne has lived her whole life so far. She never tires of venturing down the dark stairs with her father and arriving here in this bright spot with the familiar blue recycling bins and her friend the potted tree.
It seems sort of tragic that ballet students have to spend a dozen years (at least) in learning how to hold their arms in the same way as the fourteen-month-old baby in the picture above.