Spire Quests are a new addition to Fortnite, and allow players to delve into the lore of Season 6 and its main cast of characters.
For this quest, you'll need to head to one of the several Guardian Outposts dotted across the map. You can find these locations below.
Where to find Guardian Outposts
You will find a Guardian Outpost at each of the six black towers, represented on the map above by red dots.
All you need to do is climb to the top of a tower and interact with the highlighted device to activate the audio message and complete the quest.
There's nothing too complex about completing this mission, other than being mindful of other players seeking to do the same thing. Make sure you're armed before you approach, just in case.
Bear in mind that the audio device is 'indestructible'. Nothing is preventing you from going there later in the game, making it less likely that you'll fall in an early-game skirmish.
Finally, beware of the Guardians who patrol the towers — they're clumsy, but can still do a lot of damage!