Amazon unveils design for 'Helix' office building at HQ2 — here's what it will look like

"Amazon on Tuesday unveiled the latest look at its second headquarters in Northern Virginia.

The standout feature of the design proposal for HQ2 includes a unique structure, dubbed “The Helix.” Amazon described the 350-foot-tall office tower as a “spiraling vertical forest” that features outdoor walkways with trees and plants that twist up to the top of the building."