Abstract: A system of modular artificial rocks provides natural looking running water. A crevice rock has a floor and a barrier. A convex portion under the floor is over a reservoir. Water pumped through a hole in the crevice rock floor rises to a hole in the barrier. The water flows through the barrier hole and runs down the convex portion, from which it falls into the reservoir. The floor may have a depression that matches the size and shape of the convex portion. The system further comprises a second rock that interfits with the crevice rock barrier. Water is pumped simultaneously to the crevice rock floor hole and to a hole in a top surface of the second rock. The water from the second rock runs down and falls onto the crevice rock floor. A third rock may be interfit on the second rock and be similarly supplied with water.

Abstract: A system of modular artificial rocks provides aesthetic appeal to a landscape. The system comprises at least two rocks, one stacked on the other and interlocked to each other, as by a tongue and groove arrangement. The rocks have respective back ends that overhang. The back ends of all but the bottom rock of a stack are supported off the ground. In a modified embodiment, the back ends of the rocks align in vertical planes. There may be one back end, in which case the rocks can be placed flush against a fence or a building wall. In another embodiment, there are two back ends. Two or more stacks of modular rocks are placed with their back ends in flat facing contact. For example, the back ends of the rocks of each of three stacks may subtend an angle of 120 degrees. A waterfall can be incorporated into any of the stacks. The bottom rock of a stack has a depression that acts as a reservoir. Water is pumped to the top of the top rock of the stack, from where it flows back to the reservoir.