Nice photo, but I wish that was some kind of park instead of the residential area.
I always thought it would be nice to have some nicely designed big park close to/ within downtown.
High Park is somewhat far away from downtown, and to Toronto islands you need to take a ferry which makes it more like a little distant amusement park (considering the distance).
Don Valley parks are closer, but more like patches of small ones along the valley, not like a grand urban body of greenness like Central Park in New York City, at all. And you know the Don Valley highway ruins important half of the park..
I see the most possible option is to expand and improve Don Valley just east of Yonge& Bloor. They could underground lower parts of Don Valley Parkway as well as the infamous Gardiner wall, and even make part of Rosedale a public park merged to the existing one. And then redesign with more trees, better circulation, some nice architecture, and so on.