Rail Trail Tales - this is a series of geocaches along the Thornton-Cookstown Trans Canada Trail.
Did you ever watch Teenage Mutant Ninja Turtles? Remember how they lived in a sewer lair? This location reminds me of that, but after decades of erosion and degradation. PLEASE BE CAREFUL...there's sharp parts and rusty bits around. The search should not be a difficult one.
Watch out for bugs that bite, pokey plants, poision ivy and general trailside dangers.