The Mission was filmed in Argentina and in the United Kingdom.
Locations
Fort Amherst
Scene where Rodrigo Mendoza is being held in the monastery after he had murdered his brother.
Scene was shot Fort Amherst was originally built in 1755, containing a labyrinth of underground tunnels and hidden gun positions, to improve the defense of the River Medway.
Real
In movie
Iguazu Falls - Island San Martin
Scene where Father Gabriel sees the task that is ahead of him and climbs the waterfall.
Scene was shot Iguazu means Great Water in the Guarani language. It is an appropriate name for the river that travels 1,300 miles through Brazil and ends in wonderful falls in the jungle. That place connects the borders of Brazil, Argentina and Paraguay.