Arkham Asylum

Arkham Asylum is an asylum which according to its gates, is "For the Criminally Insane".

Current patients

 * O. Cobblepot
 * P. Isley
 * B. Karlo
 * E. Nigma
 * M. Guggenheim

Behind the scenes

 * In the DC comics, Arkham Asylum is where those of Batman's foes considered to be legally insane are incarcerated.