Rain never floods into this spot. It makes that odd shape every time and makes those strange weeds grow there and nowhere else.
Where is this place?
What could prevent rain from forming puddles in that area?
Would the prevention be a chemical or something man-made?
Why does the storyteller worry about it?
What difference can that spot make?
What could that spot indicate? Something special, a past crime or a coming event?
Who would occupy that home?
Hope this teaser prompted your creativity. Happy Writing!