|Inhabitants||Dr. Julien (formerly), Echo Zane|
The Lighthouse Prison is a structure built upon a small island amidst the Endless Ocean. Its only known inmate was Dr. Julien, who was imprisoned by Samukai to create vehicles for the Skulkin Army. A Leviathan was chained to the ocean floor near the island to prevent its prisoner's escape.
The prison was eventually discovered by the Ninja while enroute to the Island of Darkness. Upon their arrival, Zane reunited with his father, Dr. Julien, and they went inside the lighthouse where Julien explained his past and told them of the Leviathan. The Ninja worked together to try and escape the Leviathan, but the massive creature tried destroying Destiny's Bounty. Fortunately, Zane freed the beast and it fled the scene, allowing the Ninja to escape with Dr. Julien.
Long after Julien's freedom, the Ninja found themselves in a conflict with Nadakhan and the Sky Pirates, with the sinister djinn trapping the Ninja in the Sword of Souls. When Jay and Nya were the only Ninja remaining, they took refuge at the lighthouse, where they met Zane's clone, Echo Zane. With his help, Jay and Nya staged a battle against the Sky Pirates, but they were eventually overwhelmed and Nya was captured. Jay left the island via a portal and formed a rag-tag crew to save the Ninja.
Forcing Dr. Julien to create vehicles for him, Samukai would imprison the inventor on the island, regularly sending him shipments of supplies to work with. He would additionally chain the Leviathan to the island as a guard. Later, in his solitude, Dr. Julien would create the Tea Robot and Echo Zane as company.
As a result of the Starteeth attack severely damaging the Destiny's Bounty, the Ninja ended up crashing their ship on the shore of a Lighthouse Prison, unable to control its course. Deciding to visit the tower, they'd encounter Dr. Julien, and after a tearful reunion, Julien would explain the circumstances of his resurrection and how he had gone to be imprisoned. After evading the gaze of the Leviathan, the Ninja and Julien would escape the Lighthouse Prison by repairing the Destiny's Bounty, freeing the Leviathan in the process.
In Shadow of Ronin (non-canon)
While on route to Chen's Island, the Ninja passed by the Lighthouse Prison.
The island is surrounded by sharp jagged rocks, the largest of which covers the majority of the island. A steep staircase is carved out of the rock leading to the summit where the prison is constructed. Sparsely dotting the island is the Red Kelp of the West El Paso Current.
The prison itself is a tall stone tower. Dr. Julien installed a camera eye above the main door which is operated by a controller inside. Several crates filled the first floor and a winding staircase leads to the main floor of the lighthouse.
- Based on Nadakhan's observations, the Red Kelp of the West El Paso Current seems to be exclusive to the island.