The Jardines del Pedregal de San Angel, an exclusive Mexico City subdivision designed and built between 1945 and 1953, is widely recognized as one of the most important works of modern architecture in Mexico. A turning point in the career of its architect, Luis Barragán (1902-1988), it has also been said to mark the emergence of a distinctly Mexican modernism. Since the 1970s, Barragán's postwar designs have typically been discussed as Mexican in essence and association, yet study of El Pedregal reveals how this project was also informed by broader trends. For commentators in the early 1950s, much of El Pedregal's success and regionalist aesthetic lay in its sympathetic integration of architecture and landscape, and in this Barragán was clearly informed by the work of Le Corbusier, Richard Neutra, and Frank Lloyd Wright, among others. This paper considers El Pedregal as part of an international discourse, circa 1930 to 1950, on the integration of site and architecture.