On courses in industrial areas, place rolls of barbed wire or scrap metal at the sides of fw's. Think of it as the American Rustbelt answer to gorse.
Route holes so that maintenance sheds are in play. They currently waste a lot of land.
Place cartpaths at greensides or near ideal LZ's. (Cartpaths are a huge investment. Someday an architect is going to figure out a non-ironical way to use them in his designs and make himself rich and famous in the process. You heard it hear first.
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Short par 4 where the strategic play is to hit your drive over the green.
Use soils native to an area in bunkers, such as clay in the SE, loamy soil in the NE. If it bakes out in the summer or puddles up in the winter, play it as you find it. It's a hazard, no?
Instead of man-made ponds in the SE, grow kudzu, or the equivalent nasty vine native to other areas.
Build a 8200 yard course if it will host a PGA event. The pros will be forced to hit mid-irons into par 4's. Hold the phone. That's too radical. Forget I mentioned it.
Bob