I'm currently designing a megadungeon of sorts that's structured as a variety of logically interconnected levels with their own theme and lore (if this sounds like Dark Souls its because I'm taking heavy inspiration from it, although the "base camp" town the players depart from invokes Darkest Dungeon).
Help me generate some ideas for interesting levels/sublevels, bonus points for an evocative picture. The general tone is dark fantasy, but I'm not opposed to throwing some curveballs in there.
Example:
~ Hall of the Buried Colossi ~
"Ages ago, the Old King commanded enormous beings made of alchemically constructed flesh, given life through occult magics. After the fall of his empire, they sank into the earth, breaching the warrior tombs that lay beneath them. Some say they simply lay dormant, and retain their artificial consciousness."