Fort Celeste III (not to be confused with the Blackout of Celeste) was a disbanded project by ex-Grand Admiral cjsaurusrex. It was a recreation of the familiar Fort Celeste I and Fort Celeste II bases of the Roblox Assault Team, and included a large section of roads through a section of mountains.
Fort Celeste III did not end up being finished, as cj postponed its creation prior to resigning and creating Icewatch.