Assassination of President Kennedy
The view of the grassy knoll from where it was reported that the gun shots actually took place.
The view of the Texas Schoolbook Depository where Lee Harvey Oswald was supposed to have been able to not only see Kennedy in his car but be able to fire six shots back to back with arguably the worst weapon money could buy.
Both of these camera images are from the exact same spot on the road, merely rotated. The grassy knoll clearly has the better vantage point.