This is one of the most remarkable example of the hability we have to create and redo a bulding. If you know what happenned on September 11th 2001 the Word Trade center collapsed and was completely distroyed. In less than 6 years. It has 541 m.
This is an skyline of New York. 
This is a comparative photo describing how high are the buildings we have in the world.
You can see more information about these sky scrappers here.
http://www.jmhdezhdez.com/2013/07/curiosidades-rascacielos-arquitectura.html
http://es.classora.com/reports/q23066/ranking-de-los-edificios-mas-altos-del-mundo
