Aquarium is a Labyrinth City located in the Sternbild Kingdom near the border of the Atarakua Demon Empire. First seen and visited by Rou in Day 189.

The main income of Labyrinth Cities comes from the adventurers that enter their dungeons and return with dropped items and treasure. There are also some that seek to challenge the dungeons, determined to find their own path to follow. To help outfit these adventurers, there are shops for weapons, armor and magic tools. There are also people that run shops that sell second-hand magic items, including tools that improve the profitability of hunting.

Known dungeon:

【Age of Gods Dungeon】, made by the 【Demigod of Spring Water】, 【Aquarium Forlia