Architecture — PenPlace Arlington
Amazon's Helix at HQ2: The Double-Spiral Tower That Hasn't Been Built
Amazon Helix Amazon Helix construction status Amazon HQ2 Phase 2 Amazon Spheres vs Helix Arlington Virginia HQ2 biophilic office architecture double helix building green skyscraper design NBBJ Helix design PenPlace Arlington
The Helix was designed as a 350-foot double-spiral tower with landscaped walkable paths at Amazon's HQ2. Four years after approval, the site is still empty. Design, engineering and current status.