Raiding an artefact from Stealthy Stronghold and Coral Castle is one of the final challenges released for Fortnite Chapter 2 Season 6.
Much like how you found the golden artefacts during the first week of this season, you'll need to hunt down one artefact in Stealthy Stronghold and one in Coral Castle.
Once completed, this challenge will reward you with 24k XP, which will help you unlock the Battle Pass skins before Season 6 ends.
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Coral Castle artefact locations in Fortnite explained
To complete this Fortnite challenge you need to find one artefact in Coral Castle, before, if needed, heading to Stealthy Stronghold. There are a total of three artefacts to choose from, which is useful if you're trying to avoid other players who might also be in Coral Castle.
Below you can find a map of the artefact locations in Coral Castle, followed by short descriptions on their exact location.
The first artefact can be found in the ground floor of the southernmost tip of the Coral Castle ruins. The easiest way to find this artefact is to destroy the wall directly left to the ramp at the southern end of the ruins and head into the room you've just granted yourself access to.
The second artefact in Coral Castle can be found underwater in the pool within the central part of the ruins.
The final artefact can be found underwater beneath the archway directly north of the main Coral Castle ruins.
Remember - you only need to collect one artefact from Coral Castle and, once you do, the remaining ones will disappear.
The alien invasion of Fortnite has begun! Expect a new Season 7 Battle Pass, UFOs, Alien Artefacts, Cosmic Chests, ray guns, payphone locations and rubber ducks to be added to the new map. Elsewhere, we have a new Victory Umbrella, and later in the season will be the arrival of a Superman skin.
Stealthy Stronghold artefact locations in Fortnite explained
There are three artefacts for you to find in the Stealthy Stronghold for this Fortnite challenge, but you only need to collect one of them. Once you've done so you'll either need to visit Coral Castle or the challenge will be completed depending on your progress.
Below you can find a map of the artefact locations in Stealthy Stronghold:
The first artefact is located in the small building directly north of the main ruin inside the stronghold.
The second artefact can be found in the south-eastern room of the main ruins in Stealthy Stronghold.
You can find the final artefact in the ruined tower in the western section of the Stealthy Stronghold. If you're having trouble finding this tower, follow the stream around to the western side of the stronghold and then head into the tower's ground floor to find the artefact.
If you've only collected one artefact so far, you'll now need to visit Coral Castle to complete this challenge, because the remaining two in the stronghold will have vanished.
If you'd like to learn more about Fortnite Season 6 before it ends, visit our pages on the Battle Pass, damaged telescope locations, the downed black helicopter location, safe locations, research book locations and how to unlock the Neymar Jr. skin.