While DH is away, Granny will play. Those two circles used to hold a pine tree and a birch tree, storms got them. After a year of saying I would I decided to tackle them. I gathered all the gravel in the left one, strained the dirt off it in the blue pail with the wire over it, hauled several pails of gravel to the fire pit area, then dug a hole for a new tree. Oh yes, I also rolled a rock off that was about the size of that stump. I am trying to get rid of the stump but it will take me many days. But at least the left one is ready for a small tree.