This stunning wooden helical staircase has been created for a cozy residential project in the Atherton District in San Francisco, California. It connects three floors and is the center piece of the architectural design. The open space lets light through and creates a roomy atmosphere throughout the building. SILLER was responsbile for designing, building and installing this architectural feature staircase. https://www.stairs-siller.com/helical-staircases/san-francisco-palo-alto-curved-wood-staircases