New York, United States of America.
Full titles read: "Blowing down to build up - Hustling engineers with dynamite have replaced the more leisurely housebreaker and his pick so familiar a street sight here."
L/S of derelict buildings exploding and collapsing to the ground in a cloud of dust. The action is scene again in slow motion. M/S of wall collapsing and falling to the ground from ruined building. L/S of large chimney being detonated. Various shots of several buildings being blown up.