CBS4 News has learned if mass arrests happen at the Democratic Convention, those taken into custody will be jailed in a warehouse owned by the City of Denver. Protesters have already given this place a name: Gitmo on the Platte." Inside are dozens are metal cages. They are made out of chain link fence material and topped by rolls of barbed wire. In past conventions, mass arrests have taken place. Each of the fenced areas is about 5 yards by 5 yards and there is a lock on the door. A sign on the wall reads "Warning! Electric stun devices used in this facility." CBS4 showed its video to leaders of groups that plan to demonstrate during the convention. "Very bare bones and very reminiscent of a political prisoner camp or a concentration camp," said Zoe Williams of Code Pink. "That's how you treat cattle," said Adam Jung of the group Tent State University. "You showed the sign where it said stun gun in use and you just change the word gun for bolt and it's a meat processing plant." The American Civil Liberties Union is asking the City of Denver how prisoners will get access to food and water, bathrooms, telephones, plus medical care, and if there will be a place to meet with attorneys.