world class surf locations

Something I was just wondering about. Is there any famous surf breaks that are on a serious decline (say for whatever reason they aren't breaking as good as they have been historically..say 10 years ago)? On the flipside, is there any newly discovered breaks that have emerged over the last decade around the world that are now considered worlds best spots (just spots that anyone who's anyone in the surfing world is aware of)? Not that I have any plans to surf any of them anytime soon, just wondering.