Montauk:
7th hole is a classic Par 4.5 that uses water near the left side of the green to protect an easy 2 shot. Slightly blind off the tee, and an ability to run it up on the right side.
12th hole, 179 par 3 that sits nicely at the top of a hill, lots of trouble if you miss.
4th hole, 400 yards - play a fade off the tee and miss the bunker and avoid OB right; green has 2 bunkers with a narrow opening that sits up from the fairway.
Cornell
The problem with Cornell it is difficult to call any of the holes "very good", most are good. However, I like the Par 3 2nd which plays along a wetlands area and the short 4 10th which is well bunkered.
I mentioned the 11th as RTJ quirk the other day due to its narrow green and landing area set in the woods coming from a wide open landing area.