You are in a 20-foot depression floored with bare dirt. Set into the dirt is a strong steel grate mounted in concrete. A dry streambed leads into the depression.
[FOREST] [EAST] [E] [WEST] [W] [SOUTH] [S] [BUILDING] [HOUSE] [UPSTREAM] [GULLY] [NORTH] [N] [ENTER] [INWARD] [INSIDE] [IN] [D] [DOWNWARD] [DOWN] [DESCEND]