Helical staircases are often designed to be show-stoppers, focal points of architectural spaces that are intended to impress. But even compared to its eye-catching peers, this staircase developed by Webb Yates Engineers and The Stonemasonry Company is unusually audacious. Developed for a residential design by RAL Architects in Formby, UK, each step of the two-story, 4.6-meter diameter helical staircase is composed of an individual block of stone, giving an impression of weightlessness as the...