I find it a little ridiculous that there is no education in the future. How about some schools?
Also, you'd think that there would be hangars lying around in places. Even if there every aircraft in the future is a VTOL, there would still be hangars lying around, considering 2 world wars would probably delay the demolition of them.
Not all oil is offshore. With tiberium algae, oil derricks would probably be the primary method of getting oil. They can explode too

Where'd suburbia go? Normal houses in the temperate theatre please
You know, air traffic control towers would still exist near airports as well.
Even though they wouldn't be usable, parking garages would still look good in cities.
I've noticed cars everywhere but they're is no place to buy 'em. How 'bout some dealerships?
You know those large crane things in ports that are used to unload large container ships?
Sports would still exist in the future. Soccer (football for people outside of Canada and the U.S.) pitches, Hockey arenas (Big, indoor ones like the Bell Centre), Baseball fields etc.
This post has been edited by BlackieChan: Dec 10 2007, 08:38 PM