I believed I posted this on another post.
This site is great if you are feeling nostalgic for horse racing the way it used to be. It goes state by state and gives interesting information about that states racing circuits and tracks to include old pictures of the track and current satellite images of where the tracks were located after the tracks were demolished.
They did a great job on the Mass fair circuit.
http://www.horseracing-tracks.com/tracks/sindex.htm
