Hi, there is a pretty large sewer you can go into in the merchant area where you kill the culprit of the black market/ merchant wagon. I've explored the whole first area, and also killed the Executioner.

I noticed that there are 2 Sewer Pipes leading to another whole Sewer and I'm exploring these vast areas with no quest chain for the sewers so I put it on a halt until I know if its just a free area to explore, or part of a quest.

My question is without any spoilers about whats in the sewers, Are there any quest chains I should obtain first before venturing the Sewers, because I'm currently searching around making sure I'm not missing any quest chains for the Sewers before I continue to venture through them.