Even in this relentlessly vertical city, famous for walkways that feel like aerial labyrinths, you can’t levitate forever. Where the mountain rises up faster than the towers, you bump into a hillside and come back to earth. In Hong Kong, the ground is everywhere.The terrain that weaves between streets, through public spaces, and beneath buildings in Hong Kong reminds observers of the tenuous relation between the city and its geology. Karl Kullmann photographs these zones of contact between the multilevel metropolis and the mountain, reflecting on the city's genuine landscape infrastructure and the urban experiences that it grounds.