In what 1986 movie does Jeremy Irons scale South America's Iguazu Falls?

"The Mission" is a 1986 British period drama film about the experiences of a Jesuit missionary in 18th century South America. The film is set in the 1740's and involves Spanish Jesuit priest Father Gabriel (Jeremy Irons) who enters the northeastern Argentina and western Paraguayan jungle to build a mission station and convert a Guaraní community to Christianity.The Guaraní community is not initially receptive to Christianity or outsiders in general, shown by the opening scene where they tie a priest to a wooden cross and send him over the Iguazu Falls, a large waterfall they live above. Father Gabriel travels to the falls, climbs to the top, and plays his oboe. The Guaraní warriors, captivated by the music, allow him to live.

"The Mission" is based on events surrounding the Treaty of Madrid in 1750, in which Spain ceded part of Jesuit Paraguay to Portugal.  Father Gabriel's character is loosely based on the life of Paraguayan saint and Jesuit Roque González de Santa Cruz. The story is taken from the book "The Lost Cities of Paraguay" by Father C. J. McNaspy, S.J., who was also a consultant on the film.

The film was mostly filmed in Colombia, Argentina, Brazil, and Paraguay. The film grossed $17.2 million dollars at the US and international box office against a budget of £16.5 million , which at the time was the US equivalent of $25.4 million dollars, making this film a commercial flop. The Mission received mixed to positive reviews from critics.