OK, I found some incredible ballpark pics. Here's the first one, Exposition Park (August 5th, 1905)
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
The second one is called "Raising of the Pennant" and was developed May 20th, 1907. This leads me to believe it is a pic of the Chicago Cubs stadium?
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
Next, is a picture of Shibe Park, Philadelphia. This is from 1910.
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
Now this is an absolutely beautiful and perfect picture of American League Park, New York, from 1910:
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
Another great shot of American League Park, from the other side:
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
Here's Cleveland Stadium under construction, 1931:
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
Cubs Park, 1929:
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
Bennett Park, 1907:
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
This one's perfect for in-game use, West Side Park, Chicago, 1908:
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
Another one with potential for use in the game, Polo Grounds, NY, 1910:
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
Polo Grounds III, 1905 (final game of world series):
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
West Side Park II (Chicago), fifth game of World Series, 1906:
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
South Side Park, Chicago Whitesox, 1906 (final game of World Series):
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
Another West Side Park shot from behind the plate, this one from the 1909 Series:
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
Here's a much better shot of Bennett Park, 1909:
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
South Side Park, Chicago, from behind the plate (almost):
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
American League Park, Washington DC, 1905:
http://lcweb2.loc.gov/cgi-bin/query/...psbib,pan,detr
Wrigley Field, 1929: