On June 3, 1967 — Harmon Killebrew launches the longest home run ever hit in Metropolitan Stadium, a 503-foot shot which travels deep in the second deck of the left-center field bleachers. The stadium chair the ball hit by the Twins’ outfielder is mounted high on a wall overlooking the flume ride at Nickelodeon Universe in the Mall of America, the former site of the Met, in the precise spot the ball landed in the upper deck in deep left-center field.

Baseball Reference June 3