“Tarzan and the Mermaids” (1948) was filmed in Mexico , mainly around Acapulco and in studios and locations in and near Mexico City, plus the Teotihuacan ruins.

Main filming locations

  • Acapulco, Guerrero, Mexico – used for many of the ocean and cliff‑dive exteriors around the fictional island of Aquatania.
  • Puerto Marqués and Will Beach (near Acapulco) – coastal and “Aquatania” shoreline shots.
  • La Quebrada, Acapulco – site of the dramatic high‑dive sequences.

Studio and interior work

  • Estudios Churubusco, Mexico City – interiors and underwater tank work were shot here as part of RKO’s collaboration with the studio.
  • Additional interior and city‑area exteriors were done in and around Mexico City itself.

Special landmark: the temple

  • Teotihuacan (Aztec ruins near Mexico City) – used for the exterior views of Balu’s temple, giving the film its distinctive “ancient ruins” look.

TL;DR: When someone asks “where was Tarzan and the Mermaids filmed” , the answer is: on location in Mexico—especially Acapulco (cliffs and beaches), Puerto Marqués/Will Beach, La Quebrada, plus Mexico City and Estudios Churubusco, with temple exteriors at Teotihuacan.

Information gathered from public forums or data available on the internet and portrayed here.