What your looking at is a pool we are just about to plaster and put water in.  The larger rocks in back (under flag) are the main waterfall with a built in slide.  The more wall like stones is a lower water fall which circulates into a separate small pool connected to the main pool. It appears as if the water is coming through from the upper pool.  The building in the back is a pool house designed to look like a barn.  Not shown in this picture is a beach entry patio  (under water patio) for small children and chaise lounges, and an a conversation area  with jets, air blower, built in sitting benches (with varying heights for all size people- children through adult) with heated water.