The titles of these things were getting to be too long-winded.
So yes, the Camden Highline.
The official website.
Where they hope it will be, just north of the Regent’s Canal:
Click on that to get it twice as big, and consequently (if your eyesight is anything like mine) legible.
Those little green circles are cameras. Presumably this means good places for photography. If and when they contrive this, I will definitely be checking it out.
Long moderately high platforms, even ones that are not very high, often supply great views, because you can walk along them until the great views appear.