Talk:The Witcher 3: Wild Hunt/@comment-173.184.193.142-20150614185802

When and how do I access the crypt (sewers) in Vizima. All I have found so far is a red block in the wall by the chapel looking building and when holding L2 for Witcher Senses, and pressing X to examine it, I can hear what sounds like a door opening or something of the sort but can never find it or anything else. PLease HELP!