Skyscrapers can appear just about anywhere in Houston.

Patricia Belton Oliver, dean of the Gerald D. Hines College of Architecture atthe University of Houston

Even though Houston doesn't have zoning, identifiable areas like the TexasMedical Center have sprung up.

Downtown is urging people up from the underground tunnels with Discovery Greenand the neighboring developments of the Four Seasons and One Park Place.Opportunistic “zoning” follows the development dollar.

The city was built in respect to the bayous, but only recently has the value ofthose bayous been re-elevated.