DFRPG Asheboro Campaign
The Underground entrance is usually a sewer grate or some form of door into the ground. The entrance is also mobile. Once a week, more or less, the entrance may or may not move to a new location in the city. Sometimes it can stay in the same place for months, other times, it moves in a few days. No one seems to understand why or how the entrance moves, but it always lets one enter in the same place in the underground sewers that lead to dark markets, darker people, and blackest things.