19. 'The Lake House' (2006)
This romance scores by having one of the weirdest time-travel gimmicks ever: Keanu Reeves and Sandra Bullock send letters to each other via a mailbox at a rental house — even though she is writing and reading them exactly two years after he is. (Many time-travel movies don't make sense if you think about them too hard; this one doesn't make sense if you have an autonomic nervous system.) Reeves and Bullock are appealing together, although it seems like a missed opportunity not to put them on a bus that, should it go over or under 50 mph, travels back to the Renaissance Era or something.