the high observation towers and security fencing at the entrance to the magilligan prison in county londonderry

architecture barbed barriers bars behind bienevenagh blocks blue center clouds corrugated county crime dangerous detained detainees detention deterrent electric entrance entry equipment fences forestry gaol gate glass guard guarded high incarceration ireland limavady londonderry look magilligan markings mens metal mountains northern observation out point points political post prison prisoners punishment rehabilitation remote road secure security service sheet sky strand structure system tinted towers utility walls watchtower wings wire with