High art: the museum that is only accessible via an eight-hour hike

The Frattini Bivouac is part of a Bergamo gallery’s experiment to ‘think like a mountain’. But in the thin air of the Italian alps, curatorial ideas are challenged in more ways than oneAt 2,300 metres above sea level, Italy’s newest – and most remote – cultural outpost is visible long before it becomes reachable. A red shard on a ridge, it looks first like a warning sign, and then something more comforting: a shelter pitched into the wind.The structure stands