Check out Brian's (Steelsun) thread:
http://www.texasphotoforum.com/forum...ighlight=route
There's also a bunch of stuff to shoot just walking around the Galleria area. Do a search on the forum first, though. There are some places, like the Williams Tower, where you might run into security. You can also go downtown and shoot the big buildings and the parks.
Then there is always Glenwood Cemetery:
http://www.glenwoodcemetery.org/
Glenwood is a permanent thread on TPF, so do a search on it, and you'll see what I mean.
After you get all of these things shot, let us know, and we'll give you another list.
Good luck.