&amp;lt;a href=&amp;quot;http://www.amazon.com&amp;quot; target=&amp;quot;_blank&amp;quot;&amp;gt;Amazon&amp;lt;/a&amp;gt; is currently constructing three glass &amp;#39;spheres&amp;#39;, which will contain treehouse meeting areas and around 3,000 species of plants. The design is by innovative design practice &amp;lt;a href=&amp;quot;http://www.nbbj.com/&amp;quot; target=&amp;quot;_blank&amp;quot;&amp;gt;NBBJ&amp;lt;/a&amp;gt;. This will serve as the centerpiece for its new headquarters, set to open in 2018. 