D&D General Is there a model for a megadungeon

[THEMNGMNT]

The Angry GM has a long series on the topic:

Megadungeon Monday: And Then You Make a Map | The Angry GM

The Angry GM delivers advice to players and dungeon masters of fantasy role-playing games with humor, snark, and attitude. Game masters and players are sure to find something of use, whether they are playing AD&D, D&D 3.5, D&D 4E, 5E, Pathfinder, D&D Next, or any other role-playing game.

theangrygm.com

One of Angry's best series. Unfortunately, he hasn't touched it in a long time.