Not specific drives really, I used to frequent the country caliche roads (not sure if other areas in the world have this, its a weird kind of gravel like surface) north of edinburg. There are alot of small lakes out there with almost no traffic and some nice twists in the road. It is hard to explain exactly but police presence in the area north of edinburg is almost non-existent as long as you dont go more than 30 miles north and run into border patrol. I don't know about you, but no police and country roads is a recipe for goodness in my book. Hope you enjoy the valley and I hope in no way does your experience with the gulf coast and valley mar your impression of the great state of Texas.