Infinity Island is an island headquarters of the League of Shadows, located somewhere in the Caribbean Sea. The League has a vast fortress complex on the island, with modern security and numerous guards. It also has a Lazarus Pit.
Dr. Serling Roquette was held prisoner on Infinity Island after her kidnapping, and forced to create the Fog. Red Arrow infiltrated the island and rescued Roquette.[3]
After being killed on a mission at Cape Canaveral, Ra's al Ghul's body was revived in the Lazarus Pit.[4] Moments after he left, Hagen rose from the pit, and attacked them.[1]