system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] Is there a Belle Reve/Arkham equivalent in the Marvel universe?
gpt
Gotham has Belle Reve, New York has The Vault: a super-prison with cells adapted to each prisoner's powers, protected by Guardsmen (professional guards in low-grade Iron Man suits) and Sentinels.

Eventually, the Vault was replaced by the Raft, an island with mostly the same functions and tech. The Raft was heavily damaged by Electro, so Prison 42 came about. Again, with similar tech and methods, but this time the prison was in the Negative Zone, another dimension filled with hostile natives that didn't enjoy this intrusion. Unfortunately, a jail break there meant that the Raft became the go-to location again, right up until Mayor Jameson 'gifted' it to Spider-Man.