Plot hole: In one scene, he's driving from Los Angeles to Berkeley in a hurry, and crosses the bridge again (in the wrong direction). But the most direct route from L.A. to Berkeley doesn't require you to cross the Bay Bridge in EITHER direction.
The Graduate (1967)
1 plot hole
Directed by: Mike Nichols
Starring: Dustin Hoffman, Anne Bancroft, William Daniels, Katharine Ross
Factual error: There is a scene with Benjamin Braddock going to Berkeley, but his car is driving on the upper deck of Bay Bridge which only goes in the direction of San Francisco.
Buck Henry: Are you here for an affair, sir?
Trivia: Mrs. Robinson is supposed to be much older than Ben. In fact Anne Bancroft was only six years older than Dustin Hoffman.