The Royal Hideout is found in the deepest area on the southern edge of Atlantis (Location), where Mera, Aqualad, Ocean Master and the loyalists are hiding from Corum Rath after he unleashed the Crown of Thorns in Atlantis: Royal Palace.
Unlike in some previous episodes, this area is not a safe zone and there are no NPCs that would repel intruders. Drift mobs often are led into it and the Trench Mother can come close to the entrance, which may pose a danger to players not paying attention.
There are portals to King Shark's Turf and Watchtower/Hall of Doom here, next to Mera.