well, let's see...
If you arrive on American, as I assume you would, you will be in one of three terminals, A,B, or C. It is very easy to get around these three. You can take the skywAAlk from A/C to B, and the moving wAAlkwAAy between A and C is a GREAT place to see them, but I don't know about photo oportunities... I have not had good luck there. It's hard to take a shot while MOVING down a walkway with other people...
The AA train that connects the three AA terminals is an interesting thing, and I suggest you ride it as it will not be here much longer- along with our new international terminal comes a NEW TRAIN SYSTEM!!!
But if you want to get to the Delta/AirTran terminal (D), you'll need to take the airport train. It's exactly like the AA train, but it runs outside of secure areas. And it's accessed in the underground parts of our praking garages.
We have a wide range of ages at DFW. First, it was all built at the same time. All four terminals opened very close to each other, around 1974. But Braniff is, well, gone. So the other airlines have remodeled as they see fit- which is not very much. Parts of the B (Braniff's old terminal) are very... old, and other parts are new. American built some gates onto B, and they are brand new and the nicest part of the airport. Delta's is okay, not that great. American's two terminals are pretty nice. I reccomend going underground from Delta's terminal into their regional terminal- it's unique.
I have never been to the founders plaza, but would like to learn about it.
The bad thing about DFW is that it is ALWAYS busy. From 6 am to about 9 pm there are THRONGS of people all over the place.
I also recommend going to the chapel in terminal B. It was put there by Braniff, and has the original commemorative plaque on the wall. It is also a quiet place to go amidst the hectic atmosphere.
Also, when you come to DFW, you can get a good idea of what it was like before/after security.
Our terminals are all horseshoe shaped, with parking garages on the inside of the horseshoe, and the ramps on the outside. Well, the entire building used to be open in all of the terminals. But when security became a necessity, they put in the huge grey wall that divides it in half. The inside half is unsecured, while the outside half by the gates is secure. It's not nearly as great as it once was...
That's all I know about DFW. I have flown in and out more than 35 times in the last few years. It's a great airport and I like it. Lots of stuff to do, eat, et cetera. But we have NO plane store! Dulles does, why can't we?