This challenge is part of Fortnite Chapter 2 Season 1 Chaos Rising mission and is about to cross the two rings that dominate the twin chimneys of Steamy Stacks. This isn't complicated but it will require some concentration and precision.
Map
Everything is said in the title of the challenge: it is to the Steamy Stacks factory that you'll have to go. The first trick to complete this challenge quickly will be to cross a first ring as soon as you land from the Battle Bus.
Switch to glider mode to make sure you have enough altitude and then dive straight down the chimney. The rings are about in the middle of the chimney. To cross them down, you'll have to face an aeration that pushes you up. The operation is somewhat tricky but you should cross your first ring in a few seconds.
After that all you have to do is land, then walk to the heart of the other chimney. Once inside the second building, hold your breath and take advantage of the updraft to pass through the second ring. Don't panic if you miss it on the way up: you'll still be able to hover slightly above the chimney and then dive again to complete the challenge.
We recommend playing in Team Rumble mode to achieve this challenge, as it will prevent you from being attacked by eager players too early in the game.