Building sandcastles and destroying sandcastles are two separate challenges you can complete in Fortnite Chapter 2 Season 6.
Both of these sandcastle related challenges will see you visiting one of the quieter beaches on the Fortnite map. Though this doesn’t mean you shouldn’t let your guard down!
Completing these Fortnite challenges will reward you with a good amount of XP, which will bring you closer to unlocking more Battle Pass skins.