Ghazan's prison

Ghazan's Prison was a special boat prison to keep Ghazen locked up. In order to keep the earthbender from escaping the prison cell in on a boat far from the shor to keep him away from earth substances to bend. The prison is also is mad entirly of wood so Ghazan (most likley so he can't metalbend his way out).

History
Zaheer managed to disguise himself as a White Lotus member and take a boat to Ghazan's prison, where he fought off White Lotus sentries and supplied a few earth pieces to help his friend escape.