Love the web site. Can't think of any quite so screwed up construction on any of my projects.
In a combo golf and park, I recall them installing the baseball foul poles wrong, so you couldn't tell fair vs foul from whether the ball hit the mast or not. I have had a few lake elevations set wrong, and more than a few drain pipes installed by the unknowing with a roller coaster profile, which held up the drainage at all points behind the upside peaks.
I also recall a contractor knocking over the green center pole early in construction, and we didn't notice it until well later. We used the second LZ pole to build the green, so our par 5 dropped in yardage from 545 to about 500 yards, but at least our 16th hole was a gambling par 5....