This quick 2-stage multicache is located at the home of Canada's largest optical telescope. Our family loves to come here on summer nights and gaze up at the stars and spot some planets. You need to find the three letter combination to unlock the cache container.
For the final north coordinates, take the day of the month that that the stone was laid, add it to the second digit of the year, then subtract the first digit of the year. Finally, divide by 1000 then subtract to the posted coordinates.
For the final west coordinates, take the first digit of the year the stone was laid then divide by 1000 then subtract to the posted coordinates.