If completed, the largest Phoenix tower will reach one kilometer into the sky. It will be 172 meters taller than &amp;lt;a href=&amp;quot;http://travel.cnn.com/tags/burj-khalifa&amp;quot;&amp;gt;Burj Khalifa&amp;lt;/a&amp;gt; (pictured) in Dubai, which currently holds the record as the tallest structure ever built.