Can't enter from the outlet those that know the drain know why.
I know there is manhole access though and I'm pretty sure I have found some, but I was wondering if anyone that has done the system thinks it's worth it? I have seen a couple photos of a small red-brick system with a kind of weird waterfall by thongs but that's about it.
Any help would be greatly appreciated as I might be able to save myself some time if it's not worth it

On a side note I have read that there is a manhole near a certain hall
