Cliff,
Testing my memory a little here, but I want to say it is # 17 at Hamilton Farms.
Calamity is a par 3 of 200 yards, 215/220 off the back tee, with a huge drop to the right, essentially making it a forced carry all the way to the green. Under normal conditions, which have a little wind in the puss, I would hit anywhere from a 3-iron to a 3-wood, but during the Irish InterVarsities all competitors were hitting drivers, with about 30% actually being able to reach the green.
If your ball is right of the green at all, your ball will roll down the steep embankment to the bottom, which stops about 100 feet or so below the surface of the green. It is a scary shot, and a bogey-4 is a good score once your ball starts rolling down!!
On the left of the green is a grass hollow, called Bobby Locke's Hollow, bacause during the British Open there over 50 years ago, he aimed for it, hit in it every day, and made par each time!
It is a great hole, maybe someone can post a pic of it for you, although it will not do the depth justice!