Fortnite Chapter 2 Season 2 introduced many new locations to the game, including safe havens for shadows and ghosts that are dotted around the map. The update also introduced Secret Passages, special ways to enter and exit certain locations in secret.
The secret passages take the form of a portable toilet dumpster. You can run towards them and press a button telling you to hide, but when you jump inside you'll find yourself in a tunnel that automatically transports you somewhere else nearby.
These secret passages can be found in many areas, and we've marked all of the ones we currently know of on the map below.
We will continue to add to the map, or remove secret passages, as the season progresses, as we expect changes to be made to the maps over the coming weeks. You'll need to hide in a secret passage in three different matches for one of Brutus' briefing challenges. Just go to one of the locations listed above, jump into the dumpster or portable toilet you find there, and then exit through the other end. Not really 'hidden' so might have been a bit confusing for some people.
We also have a guide on how to complete all of the Deadpool challenges that have been added to the game.
You can find the rest of Brutus' Briefing Challenges detailed below.