Arkham Island

Located partway between Uptown and Midtown, this smaller, roughly triangular island was once considered to be a pleasant oasis from the crowds of the city. Most of it once belonged to the Arkham family, but during some point of financial trouble many decades ago the western side of the island was sold to make way for a sewage treatment plant and the Trigate Bridge - which splits off into a large interchange that connects Uptown and Midtown to the mainland. But the central and eastern parts of the island remained pleasant enough - at least until the local asylum started housing supervillains, and those supervillains started to periodically escape. Property values have plummeted, but that just makes it easier for the asylum to expand - which has become increasingly necessary. There are still some normal residences on the island, but they are gradually filling with asylum staff who believe a short commute is worth the risks. And as security increases, even those parts of the island outside of the asylum have begun to take on an institutional feel.