2 . 23 . 2015 Restricted Access This is part of my continued look at zoo cages and zoo display’s. This is from the Brookfield Zoo outside of Chicago. My questions is who are the Swamp Keepers and why do they have a locked door? Filed in: Photos: All, Places« Jennica in Salt LakeTrump Tower » no comments Your email is never published or shared. Required fields are marked * Name * Email * Website Comment Notify me of follow-up comments by email. Notify me of new posts by email.