How to approach the Holocaust from an original angle? KZ looks at one Nazi concentration camp, Mauthausen in Austria, as it is today: a tourist attraction. Hardly revolutionary, perhaps, but when you consider Bloomstein took his radicalisation one step further by dispensing with voiceover, archive footage, even interviews with survivors (though they were recorded), it gets more challenging. So the camera drifts and lingers ghostlike around the preserved shell; schoolgirls faint at reports of exposure punishments; a guide confesses his depression. What’s left is an arid home movie as no-frills as it comes. Horrifying in parts, but without the glue to bind it, oddly emotionless.