This image is of the shorter side of Casa Loma, with a peek a the longer aspect to the right, where the main tourist access is, provided by a broad, two level terrace. The terrace seen here almost encircles the building.
“Plastichrome” by Colourpicture, McKinnon Bldg, Toronto, Canada
The building alone contains almost 65,000 square feet of interior space.
There is no caption on the back of this photo. The image dates from the 1960s.