The Black Water probably doesn't get a mention in the pamphlets, because it is a man made drain.  Created whilst the draining of the Kongahu swamp was underway, it persists today draining all the run off from the Wangapeka terrace.   I love the layers and colours in and around this 'drain' , it is ever changing, pallettes to die for, and the critters like it too.  It is an outrageously sourced agricultural drain, but provides an endless variety of scenery and potential wildlife sightings.