Here's this week's map, the Sewer Pipes (26x18), a sludgey series of sewer pipes that no self-respecting group of adventurers will venture through without good reason. I imagine if someone steals a party member's spellbook and slips through a manhole cover that would be decent justification, but depending on how you describe the smell and viscosity of the sludge then maybe they'd be better off looking for alternatives. Enjoy!