Here's the Polo Grounds as you've (maybe) never seen it - CBSSports.com
Night Baseball at the Polo Grounds
Polo Grounds (1962) (Mets)
Willie Mays - NY Giants "The Catch" at the Polo Grounds
Another brilliant photo of the Polo Grounds from the Walker Evans Archive. September 5, 1952.
1962-04-11 The NY Mets first game played at the Polo Grounds in New York
Walker Evans | [19 Views of Baseball Game, Giants vs. Phillies, at the Polo Grounds, New York, for Sports Illustrated Article] | The Met
Scenes from final Giants game at Polo Grounds in 1957 - YouTube