Before we go any further, let us define what I mean by tombs and dungeons in this topic. Tombs are relatively small and have no more than three parts in them (a part is a section that has a final tomb room marker in it.) Dungeons, in terms of size, go from large to massive and have at least three parts to them. While tombs should be relatively simplistic, dungeons should be complex and have multiple floors. If a dungeon is massive, it should be divided into several parts to make it easier to explore (of course, interconnecting the parts can make the dungeons more interesting.) I have a few places in Twinbrook that look to be suitable for dungeons:
The large dam between the central lake and the marshes
The abandoned train station in the industrial complex
The amplitheater
The abandoned mine that the old train tracks go into (there's room for a 64x64 lot above it)
The graveyard
The barn-like house that sits inside the foundation ruins of a large mansion
The largest fishing pond

It would be neat if the dungeons had something to do with Twinbrook's past. One of them could explain why the ghosts there are green...

This is a project you're working on? sounds neat!

Yes, I am working on making dungeons for Twinbrook. Sadly, the household that consists of a barn and the ruins of a house that burned down may not be a suitable place for a dungeon. The house that burned down is just too ordinary (even if it did have pillars and a nice front door.)

I will put these layouts I made to use in the dungeons (they will be incorporated into the layouts of them as parts of them.)
Layout 1
Layout 2
Layout 3
I might even end up incorporating my Sninge Pit into one of my dungeons as a part of it, as I am under the impression that not a soul in all of space and time will ever download it as it is (which is probably why it got rejected.)

Passion! Passion! Desire! Desire! That is what I need, and I miss the good old days of my youth when I had it. To have any standing on this site, I must be very good at what I do, for not just anybody can make it here. The Creator Guidelines of this site could fill a ten page handbook and perhaps more than that. Submitting anything to this site is not a game!

I am still playing around in Twinbrook, so I can still create dungeons for that world. I just need to beat all of the ones EA made first.