I was doing some reading on wikipedia regarding various TJB albums when I picked up on a rather obscure fact. It mentions the cover for South of the Border (and What Now My Love) were taken at the Patio Del Moro apartments in West Hollywood. A quick google search shows the building is still standing. Check out this link, and compare the arch on the right side of the picture with the South of the Border cover.
File:Patio Del Moro, West Hollywood.JPG - Wikimedia Commons
File:Patio Del Moro, West Hollywood.JPG - Wikimedia Commons