Don Mills Road Underpass eastbound from E.T. Seton Park is new to me, despite decades of bicycling around the city. Just north of junction of West Don River branch and main Don River, bridge wends over rail tracks. Routed from Thornecliffe Park to the north, coming down a very long hill that I wouldn't want to bike up on. (Don Mills Road Underpass, Lower Don Recreation Trail, Don Mills, Ontario) 20200609