In the last few months the bunkering on #18 at Presidio has been renovated to a more rugged, older-looking style. I didn't do a good job with these pictures but you'll get the idea. The left bunker is quite dynamic looking from the fairway, with some little capes that appear over the top of each other. The right bunker isn't as appealing, but the chipping area in front of it is pretty severe and strategic, unlike anything else on the course. (BTW, the hole is a narrow downhill par-5 of just over 500 yards.)
The hedge left of the green has also been removed. Perhaps someone can share "before" pictures?
One can only assume this is the start of a larger project; I doubt a course would purposefully create two bunkers that look totally different than anything else on the course if the intent was to stop there. Also all of the fairway bunkers on 18 were removed. The green is just a tiny bit bigger side to side than it was before.
Presidio could use this desperately. It's not mean to say that it looks old and a bit worn, because it IS old and a bit worn, although it can be quite pretty.
I think I would spend more time at Presidio if the whole course followed the types of changes that have been made on #18.
Left:
You'll also notice that they've started cutting fairway right up to some of the bunker edges (although they've also started cutting some of the side and backboards around the greens to fairway height, which dumbs it down just a bit to me).
Right:
This chipping area will probably see a lot of shots, and it's really tough from here...
...because of this giant slope and knob, and then a straight downslope onto the narrow green. It's actually pretty intense over there. Just getting it on the green is a pretty decent shot from there if the pin is in the front. The right bunker doesn't start until at least 25 yards deep into the green.
And a shot of our beautiful July weather from the 6th green: