Aqua World Prison Tower

The  is a limited-time premium decoration released on June 28, 2016, as part of Issue 2 of the Superheroes 2016 Event.

It returned on February 24, 2018 during the Bart Royale 2018 Event as part of the Aqua World Bundle.

Trivia

 * It can only be placed on the ocean.
 * It gives different bonus for Cash and XP.