Ratwell

From Arindal Wiki

The ratwell is the well 1E of town center. In this maze of canals uncountable black rats feel at home. Although there can´t be much food for them they attack intruders with great strength and in huge groups, who can bring down even great fighters in few moments if they don´t watch their balance. Despite of all this and the fact that they don´t stop gnawing on someone when he is already fallen and hurt him even more, many people hunt here, as the sheer amount of furs promises a fat purse when returning to the surface.

From the ratwell one may reach the sewers and from there the blooddungeon.