Looking through some golf magazines from the turn of the last century, I came across a number of pictures captioned "wire bunkers".
They are what their name suggests. Wire strectched across a fw or a green to about three feet high. It looks like it might be chicken wire with stakes every 10 or 20 feet to hold it up.
I was shocked. Then I thought about it a bit. Shouldn't a truly "natural" course in a heavily urban setting look, well..., urban? So why not build such courses with walls, roads and fences? I seem to recall there are several beloved older courses that incorporate such features.
Bob