This was the first time I was here and I DID not go into the drain. I called the city because poop appeared to be coming from the main drain and I waited a few days for it to wash down and went for it. Left goes to the "hidden wonder. Right goes to the drain(s).
I met him and asked him how he did this, and he had a hard time wrapping his head around the fact that I saw this as you can BEARLY/MAY NOT BE ABLE TO SEE it from the topside. One day soon imma pursue it.
Right is a MAYBE one day but probably not type thing, however, I wasnt sure I would ever go in these things prepared to go further and further over time.