Spook Central has been all month posting the newly discovered locations where the films were shot. Some may surprise you.
Here is the list of newly posted Locations:
7/04 - GB2 Orrefors
7/09 - GB1 Reporter
7/12 - GB1 Flipped Ecto-1 Shot
7/16 - GB2 "Gracie Mansion"
7/19 - GB1 Wandering Louis Shot
7/23 - GB1 Undead Cabbie Scene
7/26 - GB1 Ray With Trap
7/30 - FDR Drive In Both Films
8/02 - GB1 Chinatown
http://www.theraffon.net/~spookcentral/scblog/index.php/shot-on-site;