The ornanmental design for a waterfountain, as shown and described.
FIG. 1 is a perspective view of a water fountain in accordance with the
present design;
FIG. 2 is a front elevational view of said water fountain;
FIG. 3 is a top view of said water fountain;
FIG. 4 is a side elevational view of said water fountain, the side of the
water fountain not shown being a mirror image of the side shown in this
view; and,