Well, my first thought is the Galleria in Dallas.There are alot of beautiful architectural features, not the least of which is the view down four stories into the ice rink.
Downtown FortWorth is pretty cool, maybe CityStreets if you want some club-type shots.
Or maybe see if you can get into South Fork Ranch.
Downtown Dallas has some neat sunken eateries (one under glass roof) that have nice landscaping.
A short drive south of Fort Worth in Cresson is the Pate Museum of Transportation. Perhaps if you call ahead and offer a nice donation (free admission,donations accepted), they will let you get closer to or even in some of the vintage vehicles they have on display inside.
Thats all I got, hope it helps.