This thread helped me to realize that part of the reason I really enjoy my course is that it has a ton of these. It seems like most modern bulldozed fairways eliminate this enjoyable aspect of the game.
At Oak Ridge there usually is the opportunity to gain a significant advantage by taking an agressive line with a long drive. Nonetheless the drive needs to be accurate (often within about 10 yards) or else a bunker, trees or a bad angle awaits.
Here are some examples:
On the 460 yard 8th - the ridge feeding into the bunker on the left means the difference between a 200 yard approach and a 150 yard approach. It is about 270 downhill yards to get past it on the left and another 20 yards on the right.
This picture gives you a sense of how pronounced thr ridge is
On the 345 yard 10th - climbing the ridge (and risking a pond at the corner) means the difference between a visiblle 75 yard (or less) shot over a blind 110 yard shot to a severely contoured green. This picture is out of date as some trees at the corner have died, making the agressive play more tempting.
On 13 - it is between 210 and 230 to get it over the ridge. If you do so, you have a 75 yard shot to a severe, elevated green, if not, you have a 150 yard blind shot from an uphill lie to severe elevated green
On the 545 yard 14th - carrying it over the ridge that feeds to the bunker on the left makes the hole reachable for long hitters. For the rest of us, it feeds balls into the bunker leaving a choice between hitting a 3 wood or trying to squeeze a tee ball in the more favorable left side
On 15, squeezing a drive in about a 10 yard space on the right side of the fairway past a ridge at 260 off the tee can result in driving a 360 yard hole when downwind on firm ground. This picture is from where you would want the ball to land.
This picture doesn't help much, but it is looking back on the 440 yard 18th hole, which is a slight dogleg right. If you can squeeze a drive next to the 1trees on the right side (left in this picture), you can bypass these two ridges and turn a 190 yard blind approach into a 140 yard visible approach. I succeed one out of ten attempts but almost always try to pull it off with a tail wind. Trees gobble a tee shot right. A pull or hook can feed off the slope into a pond.
The 2nd, 5th and 17th holes also make wonderful uses of diagonal ridges (or small hills) to make the tee shot more interesting. I do not have decent photographs of them.