Corros is a secret prison facility located on the outskirts of Siracas, Little Sword Lake. It is located past Delphie and is near The Wash, where the radiation can be smelt. The Wash is the region that forms a natural barrier between Norta to the north and Piedmont to the south.
This prison is used by Queen Elara and Maven Calore to keep the Newbloods and rebelling Silver Elite, so that Elara can control and use them the way she wants to. The prison has many cells and each cell contains Silent Stone, a substance used to suppress Silver and Newblood abilities.
The Magnetrons of House Samos control the entry and exit to Corros prison using their ability. The prison has no windows, only a skylight in the ceiling, which is small but enough to allow sunlight for a few minutes.