Urban Border Conflict from the Eyes of Google Maps

While creating a map of map-lab's massive collection of snow-globes from around the word (which can be viewed here), I came across an interesting shot above the border between San Diego, CA and Tijuana, Mexico.  Even without the graphical line, it is easy to see the border between the two countries.  

I'm not sure of the significance of this (it is just an observation from Google Maps) but here is a look at retail, housing, and recreation from a few square miles along the Mexico - United States border. 

Retail Retail in the San Diego

Retail in Tijuana

Housing and RecreationHousing and Recreation in San DiegoHousing and Recreation in TijuanaMiscellaneous Observations Unknown "Plant" in San DiegoMixed Uses in Tijuana

It is up to debate as to which scenario is "better" for its residents.  San Diego provides a clean, picturesque, well structured environment dependent on the automobile, while Tijuana provides a mix of uses, in a dense urban environment. Please comment below with your thoughts or other interesting sights you have found from Google Maps.

-Dan