If you intend to be around Mont Tremblant in Québec between now and mid-October, you've got to include a visit to Val-David and its amazing Jardins du Précambrien.
Val-David is less than one-hour drive away from Mont Tremblant. It is one of the cutest places in the vicinity, with the P'tit Train du Nord passing through (a fantastic initiative which turned a train track into a 230-km biking and hiking linear park ), little restaurants, bike and canoe rentals.
As if it weren't enough, it includes the best outdoor art installations I've seen in Quebec and Ontario: Les Jardins du Précambrien. Nested in a vast precambrian forest (from the times when the first forms of life appeared on Earth), the attraction offers a series of marked trails amidst trees and boulders.
You never know what awaits around the corner, which makes it the perfect outing with kids. The whole experience turns into a treasure hunt. They'll walk 4-5 kms without realizing it. It took us 2 hours to tour the whole thing at a leisure pace. You'll need more time if you want to read all the info posted throughout the site.
As a picture is worth a thousand words, see my photos of some of the best installations.
The Foundation Derouin is behind this project. René Derouin is a fabulous (and highly rated) artist whose work you can admire in the adjacent art gallery.