To mimic real rocks, our fountain is in rustic grey with a hint of green like moss. The exterior design is like rocks stacked layer by layer, and the water flows from top to bottom, making a trickling sound, making you feel like you are in the real nature. In addition, it is powered by solar panels, which is energy-saving and environmentally friendly. You only need to point the charging panel towards the sun to get electricity. - Garden Sanctuary Faux Rockery Outdoor Water Fountain with Solar-Powered Lights in Grey