The prison consists of a series of cement houses where low-risk inmates lived, eight to a house, with cement beds and door-less bathrooms. Outside, they had access to an open-air gym, a garden, a woodworking shop and music classes. The maximum-security building has more traditional cells, with steel bars, two beds per cell, a toilet and a small space to sit. IN PIC: A cell inside Islas Marias federal prison (Photo | AFP)