To make a river stone mat first you have to gather or purchase river stones. After that take a plastic mat and arrange all the stones on it. Then stick all the stones one by one to the plastic mat by using silicone sealer. Let the sealer dry completely.
Tree Portal Mandala I love everything about this gate: the mixed use of metal and wood, the mandala window, the tree with is filigree roots and branches, and it's placement within the stone wall. The whole thing feels.