This challenge is part of the Rippley vs Sludge Mission that closes the first season of Fortnite Chapter 2. You'll have you to eliminate a total of five opponents in three possible notable locations: Risky Reels, Fort Crumpet, or Hydro 16. You can do the eliminations in one location or in several ones, at your convenience.
Map
Like all other notable places, these are not shown by name on the map.
Fort Crumpet
If you're looking for stone, you're going to have plenty of it! Fort Crumpet overlooks Sweaty Sands to the northwest. It's an interesting spawn and normally provided in loot.
Risky Reels
This notable place has been given more prominence this season than any major city in the game. Risky was the scene of the Star Wars event and remains to this day a prime spawn, containing an astounding number of chests. If you're an aggressive player, it's a recommended spawn to complete the challenge.
Hydro 16
The Hydro 16 dam and its power station constitute a very large and significant location. There you'll find opponents ready to fight!
Solo or duo modes are preferable to complete this challenge since you'll be able to choose your spawn spot and compete with other opponents right from the start of the game.