To me the best "hiding in plain sight" design I can think of is placing a fallaway green with a fronting bunker, that sits after a ridge that players can barely get over.
The thoughtless player will try and catch the downslope to add that little bit of distance, leaving a downhill lie into the fallaway green. The thoughtful player will lay up to the top of the ridge to maximize the amount of height and spin they can get to hold the green.