There are seveal locations that are absolutely wonderful! Go to
http://campusmaps.tamu.edu/ and print a map of the campus...then try these locations:
Administration Building (big building with old style columns in the very front of campus off of New Main Dr.) - Go inside if its open. The lobby is beautiful.
Clayton Williams Jr. / Former Student Assc. Alumni Building
Memorial Student Center (MSC)
Bell Tower
Academic Building
Century Tree (old oak tree by the Academic Building)
Kyle Field (football field)
All Faiths Chapel
Across campus is the park called "Research Park" great for beautiful landscape and water scenes.
I've done walking shoots through campus to these locations if the bride doesn't mind the walk. You can also drive to get somewhat closer but parking during school is difficult. Weekends and after 5pm are best for parking.