Head to the underground cave southeast of Frosty Flights.
Bird's Eye View
You can spot the entrance to the underground cave surrounded by a stand of trees.
The Secret Battle Star will appear above the mattress on top of the wooden structure!
Season 7 Secret Banner / Battle Star Locations
Fortnite Battle Royale's 7th Season's Secret Challenges reward you with Secret Battle Stars and Secret Banners! Hurry though as Season 7 ends soon! Don't miss this chance to complete the challenges before Season 8 launches!