Two great movies every one should see. Although Easy Rider (1969) received more acclaim, Vanishing Point (1971) is the film people can’t seem to forget. They are driving films going in opposite directions: Easy Rider is Los Angeles going to New Orleans (hippies meet voodoo), and Vanishing Point is Denver going to San Francisco (mile-high meet hippies). Easy Rider is chock-full of stars. Vanishing Point has relatively unknown actors.
Another one I just thought of is Network (1976). In 2000, the film was selected for preservation in the United States National Film Registry by the Library of Congress as being “culturally, historically, or aesthetically significant”.