Although not necessarily "front to back", I've always loved the way the 12th at Pine Valley runs away right to left (which is the orientation of most approach shots) almost imperceptibly from the fairway, but with much more slope and speed than is apparent.
One of the best I've seen is the 7th hole at Hawk Pointe in NJ, which is a par five. The green is narrow and long from front to back. The first 20% of the green rises up quickly, and then the rest of the green falls away (I'd estimate almost a 4-5 foot drop from the highest point to the very back of the green), ending in a chipping area behind the green. There are almost an infinite variety of shots that can be played depending on the variables of hole location, length of approach shot, angle of approach shot...just great stuff!
There is also one on a completely unknown public course in central PA called White Birch GC that deserves mention. The par four 10th hole has a green with a front half that flows out of the downhill fairway approach, and then DROPS precipitiously...as much as the Biarritz dip on Yale's 9th...probably 6 or more feet, to a lower level and continues out for the rest of the back half of the green. It was designed by the owner back in the 60s, who minimally deserves style points for something unusual and fun.