Castle Argus, also known as Argass Castle, is a location in Final Fantasy III found across the sea from Vikings' Cove and Nepto Temple. The party can enter it after completing plot events in those locations, but it will be empty until freeing the residents from Castle Hein. Equipment for Scholars can be found in treasure chests here. For saving him from Hein's evil clutches, King Argus gives the party the Wheel of Time, which Cid can use to make the Enterprise into an airship.