For those who have not completed games in the Xenoblade Chronicles series, this page contains spoilers regarding the plot. Discretion is advised.
Central Seal Island is a landmark in Xenoblade Chronicles. It is located at Eryth Sea. It is one of the Hovering Reefs, and is connected to Hovering Reefs 7, 8 and 10. It is one of the three Seal Islands, in between Soltnar Seal Island and Khatorl Seal Island. After activating the switches on those two islands, Prison Island can be accessed from here. However, once Prison Island sinks into Bionis' head during Bionis' awakening, it can no longer be accessed from here.