Boulder Waterfall Spillway

Because they're easier to build, most garden waterfalls are created from stacked flat rocks or flagstone rather than round boulders like this one. However, if you're looking to create a more natural appearance, most folks would agree that this type of spillway looks a lot more natural than stacked flagstone.

The main obstacle with building a waterfall like this is stacking the round boulders in a way that they'll stay in place over an extended period of time. In this case, preparation is key so that the ground shelf underneath the boulders is sculpted to hold the base rocks in place. Then the spillway and filler rocks can be placed with friction binds in cracks and remaining voids.