A reflection of a slice of sky and the horizontal fence boards along the back of the garden. These are marbles in the water of aone of our garden birdbaths. It's made of a large old concrete culvert, shaped like a curved piece of macaroni. The culvert is sitting on top of a clay pipe as the pedestal. I keep my favorite marbles in the water, just to give the birds something beautiful -- and different -- to look at while they splash in the water. The little songbirds love this birdbath because it's "enclosed" and feels safe and sheltered to them.