Accessibility is key. A patio directly next to a koi pond gives you the ability to be part of the pond and stare straight down at your Koi fish. A pathway can lead you to the patio or to different points of interest in your garden or waterfall. For instance, the stream might look and sound completely different at the top than it does at the bottom. A pathway can meander you along different points and allow you to enjoy your springs from different perspectives.