This is a short walk but it's a good one to start with for those looking to learn about Toronto's ravine system. That's because the city of Toronto parks department has developed an interpretive nature trail through the Glen Stewart Ravine and an attractive pocket-size guidebook to go with it. The city hopes that city residents in general and school groups in particular will take advantage of these resources to learn to appreciate the beauty and hidden charms of this narrow ravine. Another interesting aspect of this walk is the contrast between...