What are some notable examples? I've never played one that I can recall but I have it in mind that few greens would be more fun to experience.
Here's what got me thinking about it: I was wandering the dunes at Crane Beach in Ipswich, MA when I came across what was essentially a large crater set 10-15 feet up in a massive dune. The front rim was about 4 feet higher than the bottom of the bowl, creating a semi-blind approach, and the back rim was about 10 feet higher, creating a wonderful backdrop.
These might not get the point across, but I took a couple pics.
From the front, looking up at the raised front rim (that obscures the bowl) and at the tall backstop beyond:
From behind, looking down into the bowl (which is deeper than it appears here) and how elevated it is from the "fairway" beyond: