A.R.G.U.S. Supermax is a Maximum Security Prison located on The Island of Lian Yu. It was created by A.R.G.U.S to hold extremely dangerous prisoners the site is currently located underground on The Island an only accessed by a hatch door. The Prison is mainly used A.R.G.U.S and Oliver Queen. However the other people such as Malcolm Merlyn do know about the prison. Two of the most well known prisoners currently being held there are Deathstroke and Captain Boomerang.