A pond device comprising a liquid reservoir comprising at least two opposing first side walls and at least two opposing second side walls, wherein the pond device comprises 5 a box-shaped container to be detachably or non-detachably provided on the first and/or second side walls. In particular, the box-shaped container is configured to receive a liquid output device of a waterfall device, wherein the liquid output device comprises a row of LEDs 10 located upstream relative to an outlet opening of the liquid output device, configured such that the liquid guides the light emitted by the LEDs downstream through the outlet opening and down toward the liquid reservoir.
