Thank you so much for sharing these updated images with us. Its hard to tell for certain many things I have looked at, but I may say perhaps many assumptions can be made by viewing these images.

I am guessing that the 3 holes you are referring to may be ventilation shafts or perpendicular shafts for raising ore from mining development below.The only problem with that guess though, is that their is not supposed to be any mine development in that area. I suppose they could very well be something else, but the zoom is limited, so again, its hard to tell exactly what they may be.I am very intrigued with this and it raises many questions. Also I may add, I would love to get to the property to check this all out!

Here is the link below that you can access the google map to view the property.

http://www.accuweather.com/en/ca/canada-weather