A vintage view of the mall's Main (East) Entrance. The parking lot entry of an F.W. Woolworth 5 & 10 is seen on the left.
Photo from https://www.noticel.com / "50 años de Plaza las Américas" 

The original mall was anchored by one of the largest J.C. Penney operations in the entire chain. It vied for prominence with a store at Concord, California's SUNVALLEY CENTER and was slightly larger than gigantic "Penneys" stores at SOUTHCENTER {Tukwila, Washington} and YORKTOWN CENTER {Lombard, Illinois}.
Photo from http://bibliotecadigital.uprrp.edu / Puerto Rican Digital Library / A. Gonzalez 

A circa-'68 interior view, which shows the "Penneys" mallway entrance.
Photo from Nostalgia Sobre Puerto Rico In the '70s & '80s

The mallway entrance of González Padín. This department store anchored the southeast end of the complex.
Photo from Nostalgia Sobre Puerto Rico In the '70s & '80s