The Maze of Galious area is a hidden location that can be found in the Chamber of Extinction. The Maze of Galious zone is a reference to the MSX game Maze of Galious, this was the game that inspired La-Mulana. The only reward for going is the Maze of Galious ROM.

You can get there by brining a key fairy to, Chamber of Extinction G-5, it will open a gate that will take you to the zone.