Ravencroft Sanitarium appears in 77 issues.
Arkham Asylum for the Criminally Insane is a fictional prison that is located in Gotham City. It is where most of Batman's enemies are imprisoned for treatment.
The Empire State.
The place where the most dangerous of Toronto's criminals are sent.
A New York City jail where each cell is designed specifically for each super-prisoner. Many of Spider-Man's, Avenger's and Fantastic Four's foes are locked in this special state prison. It was originally called Island Prison.
Tartarus is a US government-sponsored prison for superhumans that hovers several miles over the desert.
Formerly a high security island prison for the worst super-villains located off the coast of New York on Rikers Island, the Raft has been remodeled by the Superior Spider-Man as his new base of operations, Spider-Island Two.
A county in New York where Xavier's School for Gifted Youngsters is located.
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