The dungeons are often, imitations of the events and places from the real world. They can even be used to understand the historical facts better with proper investigations.
One such case is the 'Hidden Dungeon of Maya'.
This dungeon tells the tale of what happened in the time just when the 'Mana Bomb' was dropped on the Maya continent.
There are no monsters in this dungeon except for the mini-bosses and the main boss.
Generally, each dungeon has many weaker monsters wandering in it aside from the mini-bosses and the main boss monster.
But since the environment in the dungeon of Maya was different. Its chaotic mana-filled environment killed off every weaker being that resided in it.
As this dungeon had many battlefields located in it, millions of corpses lay rotting inside. This violent mana didn't even have mercy on the S-rankers and everyone at S-rank and below was wiped out regardless.
