This is an interesting site that I saw awhile back and while it is interesting to see, unfortunately due to popularity and people's lack of obeying signs, the site is currently closed.
Located in Caledon, Ontario is Cheltenham Badlands, a place that looks like what I would imagine Mars looks like with the red sand which is actually iron oxide from the Queenston Shale. The site is actually owned by the Ontario Heritage Trust. Long ago, this was actually a river, you can apparently tell that this is true if you walk the path but unfortunately, even when I visited 3 years ago, it was closed off due to environmental damage by humans.
Come back next Friday for another Past Point of Interest!