Dungeon Mastery: Anime Dungeons

In Konosuba Kazuma and friends recieve a dungeon map of Keele's Dungeon as a reward from the Adventurers guild...

It looks like someone simply slapped together a map generated by a map generator with no discernable entrance, or marks other than various smudged out points, and a big red X indicating a secret door to a hidden area.

Keeles Dungeon
The entrance has a quality to it that looks like an ancient temple overgrown by a giant hundred foot diameter banyan tree.

The entrance descends down a long straight staircase into the dark. Its all slapped together without too much thought to the realities of what lies beyond, or how it is accessed.