What Structures Were Once the Tallest on Earth?

People have gradually been making taller structures for centuries. So which structures were once the tallest of their day? Here is one video. Facebook: https://www.facebook.com/geographyhub/ Twitter: https://twitter.com/GeographyHub Music by Holfix: https://www.youtube.com/user/holfix Sam Kuzel and Cadre Crimson https://soundcloud.com/samkuzel https://soundcloud.com/cadrecrimson Written by: Tyler Franklin