One of my fave films:
Mindwalk 1990 A film for passionate thinkers
A US politician (Sam Waterston) visits his poet friend (John Heard) in Mont. St. Michael, France. While walking through the medieval island discussing their philosophies of life they happen upon Sonja (Liv Ullman), a scientist in recluse, who joins in their conversation. The two men listen to the ideas of this brilliant woman and discuss how her ideas can work in their own politician and poet lives.