The new Fortnite Season 3 map features a heavily flooded spot where you can spend as much time browsing it as you do swimming. A new season also means weekly challenges, and for the first week you must land in Misty Meadows and end up as one of the top 25 survivors of your match.
You'll find Misty Meadows at the bottom of your map, south of Lazy Lake. It is a large area with many locations open for you to land. Unless you have a full crew with you when you arrive, you mostly want to land near the outskirts of the region. There are several small lodges for you to close the doors and unlock the chests, rather than being in the middle of all the heated action.
After you land in Misty Meadows, your only job for this challenge is to survive. The decision is yours. For those who prefer to stay mobile, you can stick to the little landmarks and areas of the map, hiding it on the various paths with holes in the wall and waiting for it. Those who are more aggressive can charge straight into the middle of Misty Meadows and take out anyone stupid enough to face you and your friends. You can even choose to take a helicopter to fly over the map. The way you survive is your choice, and whatever feels the most fun.
You will not receive a notification for completing this challenge until you are eliminated or win your match. You'll know you've completed it before the game ends by the fact that you've landed at, or Misty Meadows when you started, and you've received the Survivor II notification at the top of the screen.