The Unholy Trinity

Awesome texture work and some nifty editing tricks (a mini-cinema). Tons of work in a unique 94' wad.
The pinnacle of myhouse.wad. Impressive. 

Trinity is, as far as I know, the first real attempt in Doom to try and make a level based on a real life location. In this case, it is a recreation of the Trinity College at Cambridge. Today something like this would at the very least be considered taboo for obvious reasons, but back in 94 the idea of recreating a real place in a 3D environment like Doom was exciting. And unlike other attempts by map makers to recreate their house/school/workplace, Trinity also stands out with "realistic" custom textures all thanks to a few pictures the author took with his camera.

Having never been to the actual Trinity College I can't say how accurate map layout is to the real building, but the map does seem laid out like a real place, save for a few liberties made for gameplay and engine limitations. There are a few outdoor courtyards, a cafeteria of sorts, a classroom, a chapel, a pretty cool movie theater, and smaller miscellaneous rooms the player will run across. Aside from very basic and obvious details that give away what these rooms are supposed to be, they are otherwise quite bare save for enemies and items. The smaller rooms suffer the most from this, being simple boxes with a bad guy or some kind of item in it and a single door. At the very least the level layout feels open enough that you can explore at your own leisure, but this can make finding out where exactly to go next difficult; specifically the hunt for the exit in the end. It isn't a terribly tough level, but it makes decent enough usage of its enemies outside and indoors to stop the player from bull-rushing straight through.

All in all it is an alright map to play solo, so long as you don't mind being a little lost and can get past how empty it feels at points.  I personally suspect it might make a slightly better map to DM in, but it probably isn't something you will come back to for a second helping.