Beneath the Swedish capital lies an intricate web of underground train lines. More than 90 of the 100 stations in the 110 km tunnel system, sometimes referred to as “the world’s longest art gallery”, have been decorated with paintings, installations, mosaics and sculptures by 150 artists since the 1950s. After spending a couple of weeks exploring arctic Norway and Sweden, London-based travel photographer Conor MacNeill headed underground to capture images of the metro stations. “They’d been famous among the world of photographers for a long time,” he says. “I wanted to see them for myself and take my own approach on the subject. I shot late into the night – I just keep getting carried away exploring.”

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