Spring, Summer or Fall, Warden woods is a beautiful trail located in the east end of Toronto. I'd say it's not big, not small, just big enough to feel like you've escaped the rush of a city into the balance of nature for a while.
If you keeping on the asphalt pathway, there are many examples of beautiful scenery to take pictures of, worthy of framing! The valley was formed by erosion caused by Massey creek through glacial deposits and the path can be winding and hilly at times. You'll see some heavily forested areas which I suspect are much lovelier in the late spring/summer months when the green foliage is out.