What can be more peaceful than watching brightly colored koi lazily swimming in a pond beneath you feet?
Place the koi pool in the perfect setting, to enhance the ambiance, is my opinion.
Provide overhead cover of a small indigenous forest on a slope.
Interspersed with some shade loving exotics, like the delicious monster...
...and a series of other pools with cascading mini falls between them.
Tree ferns are always a favorite.
A final large cascade into the lowest and largest pond.
Add a good variety of different koi.
Add suitable pathways and benches...