Urban Nation/Lollapalooza Berlin 2nd October 2017By Callum Installation for Urban Nation, at Lollapalooza Music Festival, in Berlin, at Hoppegarten, in September 2017. photo by Nika Kramer Installation for Urban Nation, at Lollapalooza Music Festival, in Berlin, at Hoppegarten, in September 2017. photo by Nika Kramer