It is widely believed that a Tarzan movie was filmed at Las Estacas,Rios Szalay, Adalberto and others, El Estado de Morelos Reproducciones Fotomecánicas, Mexico (1997), p. 158 but the closest seems to be the 1948 production of Tarzan and the Mermaids starring Johnny Weissmuller in 1948, which was filmed in Acapulco and other locations in Mexico.
