I used to commute from Pudsey to Leeds by way of the Leeds-Liverpool Canal towpath. It was 8-9 miles and a really nice ride. I used to see kingfishers, herons, all kinds of wiildlife, and witnessed the changing of the seasons in the woods.
Then I moved to Sheffield, and commuted a couple of miles from Attercliffe to Hallam Uni, again along the canal, but this time far more industrial (if you've seen the opening scene of The Full monty, you'll know what I mean).
That was OK, but when I moved to Norton Lees, on the Southern fringes of the city, I discovered that the woods behind our house contain a network of hilly woodland singletrack, which take me almost into the heart of Sheffield (England's greenest city). So now, given time, I can tackle rooty, twisty singletrack, steep drops, stream crossings and fast downhills, before emerging into the morning traffic. On my way home, I leave the queuing cars behind, and wind my way back up through the woods, making my route as long or short as I feel like, sometimes (in winter) stopping off to sit under the trees in the dark and listen to the tawny owls as they herald the night.