Very top left corner -- quite literally, a clutch of eggs.

Never mind, I see it in Marine Dungeons. How funny that I've never noticed that one before, given how much I've used that brass inlay and keep hunting for dragon inlays. I think I thought it was an insect.

Separate entrance for privacy makes sense.

I have done maps where I have discovered that I forgot to put in entrances to certain rooms. (My Sea Elves Outpost had three rooms with that problem!) Fortunately, the Color Key effect can solve that problem. If you look at the Outpost on the Atlas, you’d never know which rooms had forgotten doorways (until you turn off sheet effects, that is.)

Looka like we posted threads concurrently! Your Mesoamerican overland and dungeon requests would work well with my Jungle Adventurers suggestion. I would love Greco-Roman stuff. And I’ve been musing on designing a haunted house for Halloween, so your 1920s Horror House idea works wirh that. I love all of your suggestions but those were the ones I wanted to second.

I had to look up Delta Green. No, not to my knowledge...but would they have told me if they were? ;-) They were hippies and back-to-the-landers. (A few years after this vacation, they bought 40 acres of undeveloped land covered in redwoods, and we lived there without electricity for eight years.)