https://www.gamespot.com/articles/fortnite-season-4-map-update-hides-new-secret-unde/1100-6458654/

Epic Games has provided Fortnite: Battle Royale players with a lot to digest in the big Season 4 update. Your first post-patch flight over the island will reveal some of the big changes, like the comet laying waste to Dusty Depot, but as fans are digging in further, they're finding there's much more than what the patch notes and initial impressions suggest.