For two decades, this photographer has documented fascinating architectural details cast in concrete, focused not only on the beauty of the built environment but also on the surprising and sometimes absurd puzzles created by later interventions -- stairways that lead to dead ends, disfigured garden walls that have long outlived their purpose. Taken across several cities, these photographs form a critical reflection on architectural modernity mitigated by the photographer's love of the spaces and deep sympathy for the planners drawn to concrete as a beneficial, multifaceted material.