Raven's Island in the Sky

Raven's Island in the Sky is the secret lair of the Raven, which is an island floating in the sky, thanks to his anti-gravity technology. The "island" is concealed by a cloud, which he presumably keeps in place with gravity.

Locations

 * Gateview Prison: This maximum security prison was stolen by the Raven and brought up to his island.
 * Washington Monument: Originally a priceless monument named after the famed first president and located in Washington, D.C., this monument was also stolen by Raven and brought to his island.
 * Raven's Spacecraft: When he's not flying around in his spaceship stealing things, he parks his ship on this island.
 * Raven's Fortress: This is his base of operations. There is also a courtroom located in the building that he used to put Superman on trial.