Domed Retreat The Domed Retreat was a base used by the Legion of Doom, which was located on an island located on a lake in Southern California. Unlike the Hall of Doom, this base was stationary. Riddler, Solomon Grundy, Giganta and Sinestro were the only members from the Legion's original lineup that were members of the team at this time. It was here that Mordru, Doctor Sivana, Riddler, Weather Wizard, Solomon Grundy, Giganta and Sinestro were stationed when they were plotting the destruction of Earth with a doomsday machine. Residents Mordru Doctor Sivana Riddler Weather Wizard Solomon Grundy Giganta Sinestro References ↑ As seen in the Legends of the Superheroes episode The Roast (1979). ↑ As seen in the Legends of the Superheroes episode The Roast (1979). Retrieved from "https://superfriends.fandom.com/wiki/Domed_Retreat?oldid=74827" Categories: Locations Buildings Community content is available under CC-BY-SA unless otherwise noted.