Arkham Asylum

The Arkham Asylum is a weakly protected jail in The Lego Batman Youtube Series that criminals are known to have escaped from. Batman has always been known to have been on constint patrol because of the escapees. The Computer has pulled-up constint files and videos from the inner part of the asylum. The Commissioner seems to be the leader of the asylum, because he appears (twice) in live video from the asylum.

Trivia

 * It is shown in The Lego Batman and Super-Man Movie that the asylum cell's bars are made of paper (because "the architet was Japenese," the Commissioner said), hence why the villains always escape.
 * In the same movie Superman became the new protector of this jail.