spiral staircase takes up a square

Keywords:

abstract, architecture, art, background, building, business, circle, climb, climbing, construction, curve, descending, design, details, down, downstairs, exit, floor, go, going, hall, high, home, indoors, inside, interior, ladder, modern, railing, round, run, shape, sky, spiral, stair, staircase, stairs, stairway, step, structure, take, top, up, upstairs, view, walk, wall, white, wood,