Nature's Zen.... This realistic rock water feature is simplicity itself. Bubbling, streaming water saturates the cast stone surfaces, rich with stain and texture. The included underground basin allows the illusion of water flowing endlessly, without source or end point. Dressed with pebbles of choice, this hypnotic Bubbling Rock Fountain forms the focus of a tranquil, natural garden feature. The Underground Basin is included with the Bubbling Rock Fountain. Made of sturdy polypropylene, this two-piece reservoir is installed in ground. The Bubbling Rock is set on top, and the basin is camouflaged. We offer the optional No. HSRock75 which is One 75 pound bag of Mexican Beach Pebbles is sufficient to camouflage the HSUG110 Underground basin and cover. These smooth pebbles literally glisten as they are wetted by the water. Shown and available only in the Unique Relic as shown.