This is a sewer system that runs from Chedoke Falls, under Chedoke golf course, and comes out at the 403, just before Westdale highschool. The entrance is pretty open and can be seen from the highway. The sewer itself is divided into 4 sections. The first is a series of large steps, with sporadic manhole entrances. The steps then level out and the tunnel abandons its square shape in favour of a long tube. The water, depending on the weather, can be up to a foot deep, and the current is strong. This tube opens up to another set of steps, which lead to a large open vault, with a small waterfall. There's an access hatch here, but its locked, and requires a ladder. In the vault itself is a ladder that leads to the roof, but nothing else.