An underground city were monsters live hidden and safe. It's located under Manhattan and the sewers and the Alley lead to it. Many of the citizens aren't just monsters, some are mutants, aliens, freaks and Moloids. The Legion of Monsters protect this place. The Punisher's dismembered body was carried here by the drainage and Morbius, who acts as the place's main doctor, attached him together. Frank helped them to get rid of Ninjas led by Hellsgaard who was harassing them. Deadpool can walk freely unnoticed there if he doesn't wear a mask.