What am I?

Grainy pieces of damp earth sit on the edges of the exterior, allowing short strands of crisp green growth to venture out to the open. Small clumps of this short, green weed grow inside this dirt that sit in the open holes of a cover. This object is enclosed among almost identical red, gray and brown rectangles, whose uneven and rigid sides form outside the perimeter. The sound of trickling water can faintly be heard on a rainy day. It sits on the middle of a sloping hole, hoping to catch any streams of water as they pass over a rusty surface. The droplets fall to the bottom of what seems an endless hole, where the drops of water soak into a patch of old dirt and tarnished leaves.