The spreading of talking movies in the 1920s allowed Europeans to get to know foreign countries as if from their own experience. This Deulig-Tonwoche of February 24, 1932 shows, amongst other things, an excavation site in Mexico.
Deutsche Lichtspiel-Gesellschaft, Deulig-Tonwoche no. 008, black-and-white sound film (extract), 24/02/1932; source: http://www.archive.org/details/1932-02-24-Deulig-Tonwoche-008-1.