https://www.gamespot.com/articles/fortnite-how-to-search-between-oversized-seats-sea/1100-6461492/

Challenges for Week 8 of Fortnite Season 5 are now available, and you can take them on right now. Among the week's most challenges--if you're a paid Battle Pass owner--is one that asks players to search between three oversized seats. The reward for completing this is 10 Battle Stars, making it a desirable one to do. However, if you don't know the map well, you may find yourself at a loss for where to go. If you need help tracking down where to go, we have a location guide detailing where to go to get the challenge done.

To complete this challenge, all you've got to do is head to the mountain just north of Flush Factory and you'll find the Battle Star, as it's pretty easy to spot in that location. You can take a look at the exact location below, where you'll find a few images of the map zoomed in to where you need to be. Alternatively, you can watch the video above and see us complete the challenge for a better idea of where to go.