A portable waterfall feature is provided for use on a fireplace having a mantle and a fireplace opening, and includes a water reservoir; tubing connectors and connectable tubing pieces, which may be assembled to extend upward from the water reservoir when the reservoir is placed at the bottom of the fireplace opening and around the one end of the mantle to be connected to a dispensing tubing piece connectable at the top of the mantle. A flexible curtain hangs down over the front of the mantle and in front of the fireplace opening over the water reservoir so that water that is pumped from the water reservoir flows upward through the assembled tubing pieces, is dispensed from the dispensing tubing piece along the top side of the flexible curtain; and flows down the flexible curtain and back into the reservoir.