Where was The River's Edge filmed?

1957 film by Allan Dwan

The River's Edge (1957) was filmed in Iztaccihuatl and Amecameca Municipality, 2 places named in its Wikipedia article, in Mexico. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data