To find the cache:
At the posted coords you will see a play structure. Find the 3 letters above the slide. Convert them to their number equivalents, and add those numbers together.
Add that number to each of the following dummy north and west coords to get the final:
N 43 24.070 W79 58.876
Saw this tower when I was caching in Courtcliffe Park, so I had to come investigate. This is a tall one! It looks like it is in the process of being painted, so there is no name on it. Enjoy the nice, quiet park