I love maps. Let’s do a  drill-down to my nearest Trout Stream here in South Africa: Firstly, for those outside of South Africa…. see below: Then, below is the detail of that purple rectangle above: And below again: Detail of that red elipse above, showing the major Trout Streams of the KZN Midlands. (the red dots denote the source of each stream. The copper line shows a significant ridge of high ground, with altitudes in metres above sea level along it. ) Pick out the Umgeni River above, and here below is a general locality map of the area closer