This is a kiddie pool I built for my son. Underwater lights follow the perimeter for night. Water is filtered and has the ability to drain directly into the house drain system. The painting on the bottom of the pool is our family crest that my wife and I designed together. There is a cat cave in the back left corner that neighborhood cats frequent for shelter. The boulders I built out of cement and thick metal interior structures. Moss grows on the boulders and grape vines grow up the perimeter walls. Our backyard is always evolving. This picture is from last summer, it's now much more complex.