Fortnite Panther’s Prowl location is an area, which is very close to Misty Meadows, or rather, to the west of it. This small islet appeared in Chapter 4 Season 4, along with other similar themed islets.
There’s a huge metal panther close to Misty Meadows. One of the chests that can spawn there is in the panther’s mouth, while the other one is on the ground. The statue’s material reflects the sunlight as cyan or purple, which makes this small location look even nicer.