Ogre Castle

Ogre Castle is the stronghold of the Three Org Brothers on the mysterious island in another dimension. It serves as the base of the villains of the movie Hyakujuu Sentai Gaoranger: The Fire Mountain Roars

The castle sits on top of a gem mine where enslaved native tribal people are sent to dig for jewels for the Orgs. While the Three Org Brothers were defeated, the fate of the base is unknown as it was not seen being destroyed in the movie.