Ключевые слова: abstract, achievement, black, bottom, building, business, circular, concept, design, door, down, downstairs, empty, floor, form, goal, handrail, infinity, interior, key, light, lighthouse, metal, navigation, pattern, pipe, rotation, round, snail, spiral, staircase, stairs, stairway, step, swirl, tall, target, top, tower, travel, twisted, up, vertigo, view, wall, way,