Dungeon Entryway, Expert (Patreon)

Hello there, Experts/Masters, this week's map is the Dungeon Entryway (35x35), a very curious sight for travelers passing through the plains. In fact, I wager that your party is hardly the first to investigate it, and perhaps something remains of those who came before.. 

Your alternate versions of this map are Spectral, with eerie fog drifting out of the staircase, and Lit, which builds on the Night version with reddish light shining up from the inside of the dungeon. Does this mean that someone is occupying this place, or perhaps the original purpose of this place has something to do with that reddish glow? Only one way to find out!