Belt Auction - Does anybody know any good spots to go digging for antique bottles in New Jersey?

Does anybody know any good spots to go digging for antique bottles in New Jersey?

Does anybody know any good spots where it is possible to go digging for antique bottles in New Jersey. Preferably old dumps?

My backyard in Hillsborough had a few bottles, but I don't think they were antiques... I would think that Rahway area woudl have a lot of that type of activity since it has been industrialized for so long.