In baseball, the "Shot Heard' Round the World" was a game-winning home run by New York Giants outfielder and third baseman Bobby Thomson off Brooklyn Dodgers pitcher Ralph Branca at the Polo Grounds in New York City on October 3, 1951, to win the National League (NL) pennant. Thomson's dramatic three-run homer came in the ninth inning of the decisive third game of a three-game playoff for the pennant in which the Giants trailed, 4 -- 2.

Answer this question: where did the shot heard around the world happen? Let's give stream of consciousness first:
The important part for answering this question is: In baseball, the "Shot Heard' Round the World" was a game-winning home run by New York Giants outfielder and third baseman Bobby Thomson off Brooklyn Dodgers pitcher Ralph Branca at the Polo Grounds in New York City on October 3, 1951, to win the National League (NL) pennant.
So, the final answer is the Polo Grounds in New York City.