The X-Files teaching a brief lesson on spatial relations and geometry
Captain from Castile (Henry King, 1947)
In a film of many strange miracles and remarkable flourishes (for example: the real villain of the piece, Cortez, being allied with the hero throughout), it is the presence of the active volcano Popocatépetl that is the most striking. The large plumes of ash render the landscape more alien and fantastic than any science fiction. All the rhymes and dovetails of the final act take on a significance through light and color.
Extra cool: the volcano was apparently active when the real Cortez was there.
Love is a Many-Splendored Thing (Henry King, 1955)