While these are not the only parks in the Toronto, I have preapred a list of places located all over the Toronto Area. There are many missing parks!!! I will add to the list over time. Just off the top of my head missing Richmond Green and Mill Pond!

Guildwood Park - This park in Scarborough is known for its beautiful gardens and historic buildings, which make for great wedding photo backdrops.
Edwards Gardens - Located in the north of Toronto, Edwards Gardens features gorgeous gardens, water features, and natural areas that make for great wedding photo backdrops.
Osgoode Hall - This historic building in downtown Toronto features beautiful gardens and architectural features that make for great wedding photos.
Kariya Park - Located in Mississauga, this Japanese-style park features beautiful gardens and unique architectural features that make for great photos.
Scarborough Bluffs - These stunning cliffs along Lake Ontario offer panoramic views of the water and the Toronto skyline, making it a great place for photos.
Alexander Muir Memorial Gardens - Located in the Yonge and Lawrence neighbourhood, this park features beautiful gardens, fountains, and even a small waterfall.
Centennial Park - This large park in Etobicoke features a variety of natural and man-made features, including gardens, a lake, and even a ski hill in the winter, making it a great spot for wedding photos year-round.
Evergreen Brick Works - This former brick factory has been transformed into a unique and stunning public space, featuring beautiful gardens, trails, and industrial architecture.
Humber Bay Park - This waterfront park in Etobicoke features stunning views of the Toronto skyline and Lake Ontario, as well as natural areas and trails.
Trinity Bellwoods Park - This park is known for its vibrant, artistic community and trendy vibe, with plenty of great photo opportunities.