Sirena's Castle

Sirena's Castle was the stronghold of Queen Sirena, located on Sargasso, a world likely not far from Earth.

When the Green Lantern known as Hal Jordan of Sector 2814 was captured by the Queen's troops, he was held in the upper most chamber of this castle.

Appearance
The Superman/Aquaman Hour of Adventure
 * Sirena, Empress of Evil