Although hideous and dominated by transportation uses, the sign below shows a bit of the vibrant immigrant-driven slice of the economy in Houston.
One sign in one small mall on the outskirts has advertising for Mexican, Salvadorean, Chinese, Filipino, and muslim small businesses (at least).
Suburban lots dominate the outskirts of Houston, above, and are much more affordable than housing closer to the core. Downtown, property values can be much higher. Some people, rather than worrying about landscaping, simply cover the whole property! The town homes below cover the entire lot; the property line runs in the 6 inches between the buildings. There is no zoning and no setbacks in Houston!