It is a skyscraper that looks like it is from the future: glass, spiral-shaped, with an avenue of trees that winds several times around the facade.

For some Americans, the construction is reminiscent of a strand of DNA.

Others consider them to be an image of our galaxy.

Still others see the tip of a corkscrew that bores through the earth's crust from below - or just a gigantic soft ice cream.

The US group Amazon published a drawing of the tower a few days ago. It is to become the heart of a second headquarters, the so-called HQ2 in Virginia.