there was a film

http://www.koyaanisqatsi.org/
or POWAQQATSI that had incredibgle
footage of tin miners in bolivia
crawling up and down a pit mine
with bags of ore on their heads.
as i recall they were literally
stepping on each other to get out.
http://www.koyaanisqatsi.org/films/powaqqatsi.php
there is a trilogy of films by
Godfrey Reggio with little if any
dialogue, and striking images with
surreal musical sound track by Philip Glass.