The MTT UAC is like a little town, with streets, alleys, lots of small structures and a few cars and such. The surrounding desert has gullies and open terrain.
The drive out is kinda long -it's south of the Nuclear Plant.. You can see the domes from the AO.
Cars can make it, but it's off-road for a ways.
MTT put years of work in the place, it's pretty neat.