Please note: This code will take you to Chateau Guillard! Please try the other maps with these codes:
Ecopoint: Antarctica: 9EH20
Hollywood: X46P6
Eichenwalde: QGNNG
Blizzard World: 6SRGE
Necropolis: 7P2HQ
Kanezaka: 23112
Sources
This post utilizes other codes either in part or in full. This could be because they remixed them, used parts of them, were inspired by them, or other reasons.