Reflecting pool

A reflecting pool, also called a reflection pool, is a water feature found in gardens, parks, and at memorial sites. It usually consists of a shallow pool of water, undisturbed by fountain jets, for a reflective surface.
Design.
Reflecting pools are often designed with the outer basin floor at the rim slightly deeper than the central area to suppress wave formation. They can be as small as a bird bath to as large as a major civic element. Their origins are from ancient Persian gardens.