One of my favorite features is when an architect uses an existing ridge in the fairway, at a diagonal angle, to create wide variations in driving length and positioning for the subsequent shot.
Used effectively, they should work something like this;
A drive that takes the more daring, longer carry route, usually on a slight dogleg, catches the "downside" of the ridge, which then acts as a turbo boost to propel the ball even further along. The player who fails to land their ball on the correct side of the ridge has the opposite reaction, as their ball hits into the upslope, usually tends to run "away" from the hole, and leaves a much longer and sometimes semi-blind approach.
Sand Hills has some great ones, on holes such as 9, 11, 12, 16, & 18, and Shinnecock's 9th and 15th are classic examples, as well. A similar type of thing is evident on the 4th hole at Pine Valley, although on a straighter hole where a shot hugging the tighter right side gets a big boost down the hill while shots to the safer left tend to slide further in that direction.
#10 at ANGC is also a good example. #2 at NGLA is another good one where a successfully aggressive shot to the left side can actually reach the green, while the safe right side often ends up in a deep hollow.
What do others here think of that type of feature and what are some other good examples? Personally, I love them because they really put a premium on successful driving and are much more creative and enjoyable than just trying to drive it straight into a "tight" fairway guarded by rough or trees as an interesting test. Plus, is there anything more enjoyable than watching your drive catch the correct side of the ridge and seeing it propelled into an even more advantageous position?