Muskoka coin

I just read this news item on the Moose FM news feed.
Neato!  A coin that depicts Muskoka.

Except this is first time I have ever heard of a 3 dollar coin.

http://www.moosefm.com/cfbg/news/12942-comedian-martin-short-unveils-muskoka-inspired-collector-coin

I've also never heard of "whaleback rocks". So I looked it up and this is what I found:

http://libwiki.mcmaster.ca/clip/index.php/Main/Whalebacks