The Barrens are classified as a "Dark Sky Reserve", you can see 360 degrees of the sky, at night there isn't a light anywhere other than the natural beauty of the stars and planets. I haven't been able to talk myself or anyone else into going over at night. It is beautiful but I think at night it would be a little scary. One day, when there is a full moon I will drag someone over (watch out girlfriends)....
The rock formations are wonderful, huge vistas of rock with nothing growing on them, no powerwashers here to keep them clean, just the wind, rain, ice and snow. You can see the quartz veins running through them. These rocks are part of the Canadian Shield and 2 billion years old.
We came upon this little group of Standing Stones, needless to say we all started thinking about the "Outlander" series by Diana Gabaldon with most of the talk being about our darling "Jamie". http://www.dianagabaldon.com/books/outlander-series/ it is now being turned into a tv series.
A beautiful fall like day in Muskoka what more could you ask for.