The streets are mostly overcrowded with the lack of green areas. What if we take it to the next level? It is nothing weird seeing the train going through your building, but how about garden, promenade, swimming pool, or whatever comes your mind? A bicycle lane roof to roof; closed, of course, with natural ventilation, light and greenery? Even the floor, actually the ceiling of old streets will pay off as a commercial space, not to mention inside food production, etc. Imagine the handrail out of cucumber or tomato. This may finally lead to the futuristic cities and flying cars we all red about in comics, supporting some SDGs ahead.